This probs been suggested before, but anyway:
A new skill: Unarmed or Grappling. I dont know if punch damage is a hardcoded amount or if it can be tagged, would be nice to have a stat that is 3/1 to agility, like athletics, it gives a small % dmg increase, and a slightly larger % chance of knockdown. Having this skill depend on AGI and not STR means it wont be easily abused (Pure STR character, with this skill and powerstrike doing 200% punch damage, linking this skill to AGI means only balanced-ish builds will be able to really get tge most our of it.)
Think it would be nice.