The relationship between Stun and Physical damage has got me thinking.
There are a few things about it that make sense-- it's easier to knock someone out than to make them faint from blood loss or traumatic shock. But mechanically I have some concerns.
Particularly, the fact that they are separate tracks. Taking damage that's less than the rating of your armor deals stun damage, as does electrocution, any and all types of Drain, and a multitude of other things. There are a lot of situations where your Stun track is in trouble but nobody is going to touch your Physical track. This feels wrong to me-- that in some situations you would greatly prefer to take Physical instead of Stun.
Besides, how does it make sense for bullets to deal Stun damage to you?