I feel like the T-34 being the only tank with APCR/HVAP gives it an unfair advantage, one that it did not have in real life. While certainly less common than the Soviets, the US and Germans did make use of the round, enough to warrant it being represented in the game.
Given that unless camping, the average tanker only expends a few rounds, I'd be more than willing to bet T-34/85 usage would plummet if the M4(76), Panzers, and tank destroyers got APCR.
I'm also curious as to the accuracy of the loadouts. Was it really common for T-34's to carry so much HVAP? It was always my understanding that it was common because it was available to almost everyone, not that they were using it almost as much as their standard AP round.