T-34 armor was far better than P4, P4 had 50mm turret and flat 80mm frontal hull, T-34 sloped 45mm was better than Tigers flat 100m. T-34 does not even remotely perform how it was in real life in comparison to P4 and Shermans. And 75mm Shermans armor penetration was exact same as 76mm on T-34 IRL
No radio
No solid optics
Horrible vision for commander
Stiff gears for driver
Crammed turret so commander had to operate as gunner too
T34/76 found its match armor and penetration wise as soon as the long barreled Panzer iv f2 showed up, which was mid 1942. Tiger showed up late 1942 near Leningrad too.
If we go for realism, then all tanks should have huge range and Panthers, Tigers would destroy every t34, including the 85 variant, every Sherman variant etc.
To add to that, the Jackson, Firefly and su85 would completely one hit every axis tank at sizeable range. Same for Panthers and Tigers vice versa.
The elefant, jagdtiger and jagdpanzer iv would one shot every other tank in the game from sizeable range.
Etc etc.
Realism no.
Gameplay and mechanics yes.
Edit: now that I remember, I read Soviet after action reports of t34-85s frontally penetrating King Tigers due to poor steel quality in later stages of the war. Should we use a modifier in game like warthunder did? KT armor x 0.9!