Soviets should have 120 pop atleast.Americans can alreday do that by vehicle crew exploit.
American commander units upkeeps need reduction by 3 each,but first free unit needs to be changed too.
But if you do that it doesnt solve anything but allow more units on the field. Your upkeep would bleed you so much reinforcing units would be very very hard. And it doesnt solve the heavy tank efficiency problem. So the Soviets can still get more IS2s which further makes Ost T3 useless and the Tiger and KT still take a stupid amount of units that require much more upkeep and fuel cost to take down.
And come on Ambulance 0 pop cap already...