It's just that the T3 + KV8/IS2 combo is way more effective than teching up all the way. I'd like to see that the T34/76 gets a more consistent damage output (right now it sometimes doesn't hit anything 3 shots in a row and suddenly it kills 4/5 members). The Su85 should become a similar role to the Jagdpanzer. It's basically a more expensive version of the SU76. Katyusha is fine.
Just move the Kv-8 from Shock Rifle, its braindead to have two call-ins in one commander. And it makes the other 20 commanders for Soviets useless.