So what? Those things that were buffed are core units which were extinct because they sucked so hard. Soviets are the worst faction without commanders. Their stock infantry couldn't even get close to the term "scaleing". Their tanks were outreight useless against infantry and became obsolete once the heavy axis armor rolled out. There's nothing wrong with buffing useless units into usefulness.
You are right. Soviet really requared buffs and they got it. But ostheer dont.
Ostheer is by far the most frustrating, hard and annoying faction to play as. Because of useless vet abilities, kinda meh commanders, which not changing your gameplay. Probably the most usefull commanders - osttroopen and mech. assault and puma doctrines, simply because they at least somehow, allow ost to stay and counter all kinds of BS.
Whole ost gameplay is based around soviets and allow to play more or less effectively against old soviets (while new soviets will have advantage over ost after patch). Pretty much ostheer have weakest early and mid game, without any good shock unit, without good light armor, without any usefull vet abilities aside from sniper and MG42.
The old aurgument was - but ost have good armor. True, but this aurgument is irrelevant now, because Brits have, if not the better, but armor which is on pair with Ostheer. Soviets had numerious SU-76 and now SU-85 which will be able to counter whole T4 and cheap and powefull T34\85.
The thing is that ostheer is so badly out-dated and out of meta, so pretty much its pointless and frustrating to play as them. Pretty much all factions got re-made. Even mortar for USF means HUGE changes in general gameplay, not to mention soviets and OKW, which were fully re-made.
While ostheer remain the same ostheer from 2013, which was meant to fight only against soviets. All changes were nerfs and minor changes, which made them weaker in general. Sure something got buffed, but its more like it was things like bundlenades, which was simply useless or badly over-priced tech.