Having classes kill the 'post apocalyptic' feel. At the end of the world there isn't going to be 'classes', just people trying to make it through another day.

Classes belong in a war-shooter.

Not at all. My gaming style wouldn't really fit in with either of these two categories. I don't want my playing style to be so rigidly dictated. I prefer having the freedom to build my own character as I see fit.

+1