In any competitive game people will sadly end towards homogenization because there is no game more balanced (and more boring) than a perfect mirror match. Due to setting limitations, CoH2 can't be Starcraft (though if you squint Shocks are pretty much reskinned Protoss Zealots and Osttruppen are Zerglings

) but the difference in materiel available to different factions, as well as difference in teching, is enough to produce unique experiences with each faction.
Homogenization has been around for a long time in coh2. Remember when IS2 had 11 second reload but its shell hit like a truck? Remember when they changed Blizkrieg so they also added munitions cost for Soviet light vehicles Overdrive (because otherwise it would be unfair, right? I mean, hordes of overdriving halftracks would totally wreck Ostheer, right?) ? Remember when a 152mm howitzer hit much harder than a 105 mm howitzer? Remember when t34/76 cost 40 fuel (me neither, I wasn't in the alpha that early)?
Relic has a track record of doing great divergent design, and then the balance team steps in and homogenizes the game because turns out Sturmtiger launching nukes, Churchill having 3000000 HP, Obers having 10x the DPS of other squads etc. kiiiinda slightly remove any intelligent counterplay and competitive aspirations the game might have.
Sometimes, as is the case with 34/76, this removes the core design intention of the unit. You can see the remains of this ingame. When Axis tanks spot a T34/76 the commander will sometimes say "keep your eyes out, they always travel in packs" or something like that. Such units, once changed, are often marginalized and are impossible to balance properly.
Another thing that leads to direct comparisons is people (and Relic balance team

) often fall into the trap of looking at units in isolation, instead of their position in the tech tree and the faction they play. This leads to comparisons between units and a feeling of unfairness. Who
wouldn't like to have a vehicle crew pop out of their Panther and instantly remove engine damage? Well, okay, but to be fair, the US faction doesn't have Panthers and Tigers, that Sherman with superglue is the heaviest thing they get to field, so they really do need that leg up.
Players often neglect the "to be fair" part of the argument and focus directly on the weak points of their preferred unit.