I suppose the absolute simplest explanation is that everything is attempting to be in keeping with the intended design of this game within the confines of an entertaining arcade RTS environment.
Once again I would apologize on review of my original post in this thread. Though certainly you can sympathize with my frustrations as it seems that almost every other thread and post in the Shoutbox seems to me as nothing more than whinging about Axis faction(s)/units as if it was some damned crusade.
My central complaint here is not that axis is OP (it varies from patch to patch and game mode to game mode), it's more like that all of the design decisions they took trend towards Axis getting to play with all of the cool toys in the toybox. Ostheer in particular is unambiguously the most well rounded and well designed faction in the game with no obvious factional weaknesses. Great core inf, great support units, great tanks. Late game artillery/indirect is not as good as Soviet (at least, in current patches) but still respectable. Their core army works well even without access to doctrines.
When I say the design decisions leading towards this, I'm referring to things like the OH getting stock Panthers and late-war model Panzer IVs, but then giving the Soviets the regular T34. Or how there's all this late war kit on both sides, but then the Russian infantry is designed as though they're still under-trained and disposable cannon fodder for the most part. Or how they chose to theme the Western Front expansion around the Battle of the Bulge, preventing old favorites like the Pershing from making a reappearance. It's like, Ostheer is
Die Wehrmacht's Greatest Hits Album while USF is just one EP from the middle of the career of that army that doesn't represent how their sound changed over time. And Sov is a the Youtube Mix based off this one song you listened to one time that has a bunch of related stuff but in no particular order. I hope this strange analogy makes sense
These decisions aren't some conspiracy, it's a series of coincidences, but I find it mildly irritating. USF would have been the most ideal place to put your crazy air supremacy doctrines, but instead they, too, went to Ostheer. And they get doctrines with cheap, disposable infantry, and fast, mobile striking units like the Puma. At this point it feels like they're stealing all of the other factions themes and ideas too!