i would start with balance and bugs to get the former as good as possible, short of an overhaul, and get rid of the later. then i would overhaul the things that needed it. you can make the game ok with just balance/bugs but an overhaul is really needed for soviet/OKW, OKH teching, and USF very early game.
I'd fire the whole team except Cynthia 
i'm not sure this is going to stay legal...