No one in the group I play with (60+ off-site forum members) ever wants to be in the T-34 vs a PzIV on our 64 player server. After hundreds of hours of collective gameplay, the consensus is that the T-34 has to hide from the PzIV and focus on what infantry it can to contribute to a match, or else serve as a meatshield that minimizes the minutes Axis tanks can freely spend aimbotting Allied infantry with the coaxial AI gunner.
The coaxial AI gunner can shoot through smoke from over 500m with perfect accuracy, map awareness, and the ability to switch targets on the dime. Basically, as long as I have sight of the enemy spawn exit, NOTHING will escape. This is why it's a major balance issue if one side's tank is objectively superior to the other side's tank. These maps aren't large enough for RO1 style maneuvering, so the maneuver advantages T-34s have doesn't come in to play. From my personal experience in a PzIV, I can trade frontal shots and come out with a roughly 2:3 PzIV to T-34 death ratio, which gives me more time to exploit the aimbot coaxial AI gunner.