Allow one Physical Defect and One Mental Defect, and if you take Multiple Arms/Legs then option to double stack Burrowing Claws and Hooks for Feet.

I don't feel it is Over Powered to add one more defect of the opposite type. (Currently playing with Allow Multiple Defects to do this on but I feel that this should be a default option, so I am suggesting it).

Taking Multiple Arms/Legs I feel it is weird that your other arms/legs are normal when going with Burrowing Claws or Hooks for Feet but I like that you can counter act the draw back this way but for roll playing and/or double advantage/disadvantage then option to double stack Burrowing Claws and Hooks for Feet I feel would be a cool option as well.

I also I feel that Hooked Feet should have the ability to do a knock-back or prone defensive roll agaisnt those action on you. The point award cost could be lowered by 1 (from 4 to 3) to compensate for this.