My only three problems with CAS are that I got it like a week prior to the event and thus I really wish they would just have made different commanders. Like a Soviet CAS commander and a German Advanced Warfare commander instead of being lazy like they were.
Apparently its too hard to give soviets air support commander despite the fact that sturmoviks were wrecking havoc on the axis units all the way to berlin with all types of different bombs and gun fire.
And ostheer default weapon upgrades and T4 is advanced warfare already, axis got 44-45 stuff for their late game while allies use mainly early war units(excluding USF which have pretty standard equipment).