Soviets fight against OKW as well who have plenty of light vehicles
I think the respective costs of the two squads is fine atm. Do you disagree?
(a little late sorry)
I think they're more or less equal with same but different roles. I've mentioned a five man upgrade with t4 for pios mainly for utility, faster building/repairs and recrewing since mg42s have a pretty short shelf life if they're targeted by any sort of rocket arty. But certainly not for combat. In short, buff for support. The capping buff could be done away, it seems to mess with other shit anyway.
I also think soviets could do with a 't2' of sorts for their healing after t4 is built, increasing medic headcount and synergizing with seven man upgrade.
The ideas for both of these come from 'german engineering' vs soviet 'human wave'.