Your not alone, USF has felt incomplete since it's introduction. OKW seems so in a way also, but I haven't messed with them yet, so I don't know for sure.
That's the point...both OKW and USF lacks a few core elements which make an army an army, right now WFA cannot counter some strategies, units because of the crap faction design.
This problem is in COH 1 (Brits + PE)...I hope Relic is aware of this issue as it can lead to exploits and UP/OP balance in the future.