Something similar from Martial Power:
Rash Sneak Attack
Prerequisites: Human, rogue, Sneak Attack class
Benefit: When you deal Sneak Attack damage,
you can choose to gain a +2 bonus to the damage
roll. If you do so, you grant combat advantage to all
enemies until the end of your next turn.
Feats are generally written along the lines of an IF...THEN statement: IF you do X, THEN Y happens.
Lots of feats and powers grant Combat Advantage to all opponents until the end of your next turn. This is a +2 bonus to ALL attack rolls from EVERY opponent on the field. If you're surrounded ... or can be surrounded, that's a massive penalty by itself. It gets worse if even one of those opponents has an ability which triggers off Combat Advantage (like Sneak Attack).
Back to Reckless Strike ...
Allowing its use with Power Attack isn't that big a deal, I think. That's +2 damage at no penalty for the cost of 2 feats. It's not hard to do the same thing with other two-feat combinations.
Edit: I think the paragraph above makes a bit more sense now...
However, it's the attack bonus that concerns me. 4E attack bonuses are as rare as hen's teeth. Most are highly conditional. This may be limited to race, spending an action point, or making a certain type of attack (most commonly an Opportunity Attack). There is exactly 2 which grant more than a +1 bonus:
|+2 to OAs with Light or Heavy Blades, stacks with Combat Reflexes |
|+3 to attacks with Action Point, human only |
+2 to attack rolls whenever you like, even with drawing an OA or granting CA, is too much.