1. Static damage bonuses: These are balanced out by a lack of any kind of implement bonus to damage. In Bore Into Brain's case, it's higher because the attack is clearly conditional. Even with these bonuses, these racials are still inferior to many others, like say Dwarven Resilience, Memory of a Thousand Lifetimes, Cloud of Darkness, Heroic Effort, Elven Accuracy, Second Chance, Dragonfear, and a host of others.
   
2. Bore Into Brain's damage: When you consider its averaged DPR (damage per round), and the fact that it requires 2 standards to actually execute on average (one to grab, one to attack), while the target typically has a chance to escape before you actually get to attack, the damage output isn't actually that impressive at all. In comparison to your average striker, the output is in fact straight up laughable.
   
3. Grasping Tendrils attack bonus scaling for grabs: The reason why they grant the grab action +3/6/9 to hit is because, like racials, the grab action does not utilize a weapon or implement and thus does in any way benefit from enhancement and other bonuses to hit that normally accrue to attacks. Without these bonuses its accuracy would rapidly fall behind those of implement and weapon attacks.

Uncontainable - Morphling Racial Power
Your form distorts and melts to escape its constraints, quickly reforming elsewhere.
At-Will ✦ Polymorph
Move Action - Personal
Effect: You make a saving throw to end each slowing, immobilizing or restraining effect specific to a space currently affecting you even if that effect normally doesn't end on a save, and shift 1 square.

Assumed Movement - Morphling Racial Power
Briefly, you enhance your assumed likeness to gain the alacrity and movement forms of a foe you've previously imitated.
Encounter
Requirements: Assume Form must be active.
Free Action - Personal
Effect: You lose your movement speeds and movement types and gain the movement speeds and movement types of the creature whose form you are duplicating until that form ends, or until the end of your next turn.
Sustain Minor: The effect persists until the end of your next turn.

Assumed Resistance - Morphling Racial Power
Briefly, you enhance your assumed likeness to gain the resistances and weaknesses of a foe you've previously imitated.
Encounter
Requirements: Assume Form must be active.
Free Action - Personal
Effect: You lose your resistances, immunities and weaknesses, and gain the resistances, immunities and weaknesses of the creature whose form you are duplicating until that form ends, or until the end of your next turn.
Sustain Minor: The effect persists until the end of your next turn.

Assumed Senses - Morphling Racial Power
Briefly, you enhance your assumed likeness to gain the senses of a foe you've previously imitated.
Encounter
Requirements: Assume Form must be active.
Free Action - Personal
Effect: You lose your senses and gain the senses of the creature whose form you are duplicating until that form ends, or until the end of your next turn.
Sustain Minor: The effect persists until the end of your next turn.

Assumed Reach - Morphling Racial Power
Briefly, you enhance your assumed likeness to gain the reach of a foe you've previously imitated.
Encounter
Requirements: Assume Form must be active.
Free Action - Personal
Effect: You lose your reach and gain the reach of the creature whose form you are duplicating until that form ends, or until the end of your next turn.
Sustain Minor: The effect persists until the end of your next turn.

Amorphous Reach - Morphling Racial Power
Your limbs extend and elongate, allowing you to strike enemies that thought themselves beyond your reach.
At-Will ✦ Polymorph
Minor Action - Personal
Effect: You increase your reach and weapon reach by +1 until the start of your next turn.

Walk Between Realities - Morphling Racial Power
Reality wavers briefly at your presence, allowing you to slip between dimensions to appear elsewhere.
At-Will ✦ Teleportation
Move Action - Personal
Effect: You teleport 1 square. You do not need line of sight to the destination space. If you try to teleport into a space that you cannot occupy, the teleportation is negated.

• Pick up an object within your reach that weighs 5 pounds or less.
• Sheath and/or draw an object that weighs 5 pounds or less.
• Manipulate an object within your reach in a way that would require a minor action. You can make a Thievery check in this way. You can't manipulate objects that require more than 5 pounds of force to manipulate.

Devil's Tongue - Succubus Racial Power
Your lies are undeniable like self-evident truths, your overtures of friendship that of a long-time companion.
Encounter * Charm
Free Action - Personal
Trigger: You make a Charm attack roll or Streetwise, Diplomacy or Bluff check and dislike the result.
Effect: You reroll the attack roll or check and take the result of your choice.

Infernal Luck - Succubus Racial Power
The fates conspire with the will of Baator to thwart your enemies, cursing them with preternaturally horrid misfortune.
Daily * Aura
Free Action - Personal
Effect: You gain an aura 2 until the end of the encounter, or until you drop to 0 hit points or fewer. You may activate and deactivate this aura as a minor action. Enemies within the aura take a -4 penalty to their saving throws. This effect can't increase the total penalty on any saving throw (after bonuses) to more than -10.

Call of the Legion - Succubus Racial Power
Having proven yourself in the eyes of your dark masters, you have been granted authority over a small squad of Hellguard Legionnaires; for a price.
Daily * Fire, Necrotic, Summoning
Minor Action - Close burst 5
Requirement: You must lose a healing surge to use this power. If you have no healing surges remaining, you take necrotic damage equal to your healing surge value that can't be reduced.
Effect: Four Hellguard Legionnaires appear in unoccupied spaces within the burst. Whenever you spend a standard action to command one, the others can take an action of that type. Whenever you take a move action, each Legionnaire can also take a move action. Each Legionnaire has its own opportunity actions. You don't lose a healing surge until all of the Legionnaires are destroyed.

Hellguard Legionnaire

Medium immortal humanoid (devil); Level is equal to your level.
HP: 1 (a missed attack never damages a minion)
Defenses: AC 16 + your level, Fortitude 13 + your level, Reflex 11 + your level, Will 12 + your level.
Perception: 6 + half your level, Darkvision
Speed: 6, Teleport 3
Resist: 15 fire
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Traits:
Squad Tactics: While adjacent to an ally, the devil gains a +2 bonus to all defenses, can't be flanked, and grants superior cover instead of cover to allies. While flanking, the devil gains a +2 bonus to attack rolls against the creatures it flanks.
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Standard Actions:
Melee Basic; Hellforged Longsword (fire, necrotic)* At-Will
Attack: Melee 1 (one creature); Your level + 5 vs. AC
Hit: 4 + half your level damage. Until the end of your next turn, if the target willingly leaves its space, it takes an equal amount of fire and necrotic damage.
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Triggered Actions:
Zeal of the Legion * Encounter
Trigger: The devil is destroyed
Effect (No Action): Close burst 2 (one ally in the burst) The target gains a +2 bonus to its attack rolls, saving throws and defenses and deals +5 extra damage with an attack of its choice until the end of the active creature's next turn.
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Skills & Attributes:
Athletics: 8 + half your level, Endurance: 8 + half your level
Str: 16 (+X) - Dex: 12 (+X) - Wis: 12 (+X)
Con: 16 (+X) - Int: 10 (+X) - Cha: 12 (+X)
Alignment: Evil - Languages: Supernal

Loyal Consort - Succubus Racial Power
You beseech your charmed accomplice for help, exploiting his feelings of love and devotion to take a blow for you.
At-Will * Charm
Immediate Interrupt - Close burst 1
Trigger: You are targeted by an attack.
Target: Your Charming Kiss target, or a creature you're dominating within the burst.
Effect: The target swaps places with you as an free action. If the triggering attack is a ranged or melee attack, the target becomes the target of that attack instead of you.

• Combat advantage.
• A +2 racial bonus to Diplomacy, Bluff, Insight and Intimidate checks.
• You roll an additional d20 for your Charming Kiss attack roll against targets within your Telepathy range, and take the d20 result of your choice.

Wake of Ruin - Succubus Racial Power
You vanish in a dazzling plume of brimstone and lingering hellfire.
At-Will (1/turn) * Fire, Necrotic, Zone
No Action - Close burst 1
Trigger: You teleport.
Target: Each creature in the burst
Effect: 5 + the highest of your Charisma, Intelligence or Wisdom modifier fire and necrotic damage. The burst creates a zone until the end of your next turn. Enemies that enter the zone or end their turn take fire and necrotic damage equal to the highest of your Charisma, Intelligence or Wisdom modifier. A creature can only take this damage once per turn.

Above Failure - Nephilim Racial Power
Failure is inconceivable for one of the Chosen.
Encounter * Divine, Elemental
Free Action - Personal
Requirement: Your Pride of the Nephilim benefits must be active and you must expend your Scorn of the Nephilim or Nephilim Resilience power.
Trigger: You miss, or you fail a check or saving throw.
Effect: Reroll the triggering attack, check or saving throw and take the result of your choice. If this second roll also misses or fails, you take psychic damage equal to your healing surge value that can't be reduced.

Resolve of the Nephilim - Nephilim Racial Power
To fall is an indignation beneath you.
Encounter * Divine, Elemental
Free Action - Personal
Trigger: You are reduced to 0 hit points or fewer.
Effect: You lose a healing surge. If you do, you don't start dying from being at 0 hit points or fewer until the end of your next turn.
Sustain Free: You lose a healing surge. If you do, the effect persists until the end of your next turn.

• Their damage type resistances become vulnerabilities of the same amounts and types. Damage type immunities become vulnerable 10 + your level of the same type. If they have no damage type resistances or immunities they gain vulnerable all instead equal to your primary ability modifier.
• They lose all other immunities.
• They grant combat advantage.
• They can't benefit from bonuses other than enhancement and item bonuses.

Beneath Contempt - Nephilim Racial Power
Your contempt for your inferior foes is without limit, disdainful outrage turning away even their mightiest attacks without hesitation, though at the ultimate cost of sapping your resolve.
Encounter * Divine, Elemental
No Action - Personal
Trigger: You are hit by an attack or take damage that has one or more damage types
Effect: The benefits of your Nephilim Resistance apply to all damage types (including untyped damage) and keywords until the end of your next turn.
Aftereffect: You lose your Nephilim Resistance and can't use your racial powers (save ends both). You can only make saving throws against this effect at the end of your turn, and cannot make saving throws against this effect in the same turn you were subject to it.