It looks good merc. Could you add the race slot I forgot about?
On encumbrance, I did a quick read through and they seemed like they would be sufficiently simple for my purposes, however I forgot about dwarves. I generally allow dwarves to carry twice as much before they are encumbered, the benefit of being stocky.
That said I will tell you how I use encumbrance. If you are trying to run away from a battle I will see if the monster is faster than you... You can't get away by just running. If you are trying to catch a monster running away from you who moves faster... You have to close into combat with a missile armed enemy that is quite a ways away, how long does it take you to get there. While I appreciate players that track encumbrance when one of these situations comes up, I am going to recalculated it. Being able to add coins carried, 70 lbs for equipment and weapons and armor speeds it up. I don't usually sweat over it other than these situations.