Bigger gun on the T-34 is great, but it probably will be generally a similar drive/fight experience with what we already have. Would much rather have, if it's Russian you want, for early war a KV1B or KV2 with the 145mm howitzer, or late war the IS-2 armed with a 122 mm gun . Or if German, the PantherG and King Tiger. Or if American the M24 Chaffe (light tank), M26 Pershing and M18 tank destroyer. Or even British entrants like the Churchill (A22), Cromwell (A27M), and Comet I (A34). Those would be totally different elements in the game from what we have now, and really change the GV experiece.
It's not that I'm not appreciative of the new gun on the T-34, just some future ideas.