Some of Perks are usless now, this are my ideas how to change them:
Pyromaniac could give some defined dmg to fire based weapons [Flamers, Molotovs], for example +15dmg
Explorer could increase a chance to find some items in caves, desert, special encounter.
Quick Recovery similar to Stonewall perk*.
(Crazy sugestion)Stonewall actualy i get some info about this perk and looks like it works fine.
*Could be like:
Knockdown: You dont loose AG/3 AP (so with 9 or 10 AG, you don't loose any)
Knockout: You don't loose AG*1.5 AP (a KO is between 1x and 3x your max AP)
Or you have only the animation when KD and you loose 3 times less AP when KO.