Whooping 400 early 1940 model T-34s had no radios.
Model 1941, with the F-34 gun had standard 9-RS radio set, and even thicker armour.
Gun was not inaccurate and optics were similar to these on Shremans.
Bad performance was a result of bad Training, so at lest that you got correctly.
However, in CoH2, both T34 and P4 are represented alright.
T34 did had much better armor, especially later models, but P4 had superior armament.
Vipper its CoH2, ist DEFENSIVE bonuses that allow you to be aggressive and offensive.
This is why tanky infantry can be offensive.
This is why more beefy tanks can push further.
Armor vet does play into offensive capabilities, especially against handheld AT and other meds.
The T-34/76’s one great weakness was its fire control efficiency. It suffered from the same two-man turret syndrome as other Soviet tanks in this period, namely that the tank’s commander, gun aimer, gun firer and platoon commander (if a platoon leader), were all the same person. Exacerbating this was the fact that the T-34/76 had relatively poor main gun optics quality, no turret basket, a very cramped and low turret (the gun could not depress more than three degrees severely restricting use on a reverse slope or at close range), poor turret drive reliability, no radios, and generally poor target observation and indicator devices (including no turret cupola and only one vision periscope for the tank’s commander).