Cost decrease on T-34 won't help much. In fact it will make things worse as it will make first T-34 come faster which will cement good early game for Soviets.
But the main problem is that cheap units without late potential are not viable (conscripts, anyone?)
Also, why not just wait for the patch?
+1 Hit it right no the nail.
Maybe upgrade to OT-34/76, which will change frontal mg to flame thrower,
something like 100-120 mu (so you can't spam them), only frontal usage (very small ark), worse flamer characteristics than KV-8, generally - quite bad flamer, but flamer with it benefits. It was one of the most mass produced flamer tank of WW2 - 1170 OT-34/76 and 331 OT-34/85. It will solve - 1.performance against infantry, 2.late game potential, 3. munition float for SU, so you will chose between more mines/demos or T-34/76 upgrade.
This could be a cool way to achieve a reason to even have a T34 late game. I really think that a lot of problem with unit scaling could be fixed with some good upgrades.