Ofc its unique. Every (semi-)elite unit arrives around CP2-3. Only OKW needs its most expensive tech structure to get them (their elite) out. If you dont rush T4 its gonna take some time until you get them out. Therefore the shock value between Lmg Obers and Lmg Paras is vastly different.
Ostheer and Soviets dont even need elites, cause they have the best mainline inf in the mid and lategame. In theory USF doesnt really needs elites too, cause their mainline scales good enough to be useful lategame. But their weapon tech/upgrade is a little bit too costly.
Compared to Ost/Sov Okw has way bigger popcap problems. I dont understand how you can think that OKW has an easy time getting 2 Obers on top of 3/4 mainline squads and support weapons with their heavy popcap tanks.
What your saying is a bit strange, every allied elite comes CP2-3 while PG can come earlier especially if your talking team games. Falls are CP2 but are doctrinal like most allied elites. In your last statement you say tanks which means your talking mainly team games if POP is that big of an issue. If your not then fitting in 2 Obers is feasible along with 2 MG and 2 raks which is fairly meta. Only when your talking Panthers is POP that big of a problem.
Going to your original post, aside from combat performance, players go for Fussies for their Utility such added sight and Flare which ends up being fairly useful in all modes. I think that is where VG should get a buff, maybe the ability to throw down a cheap AI mine that drops only 1 model similar to the soviet doctrinal one(7 muni I think). This way VG would be able to dictates fight better with out messing with overall balance.
I agree in theory about USF, but in practice since they are designed to assault they need to get in close with double bars which causes a unstainable amount of bleed which is fairly well known. The whole Pathfinder/scott meta allows the USF player to bypass this massive weakness while still paying similar to the same in weapon upgrade cost(1 or 2 Bars) along with same tech cost.