Well the original factions have more than twice as many as anyone else and there is no real need for any more
The only significant gaps I can think of is Guards + IS2 and Shocks + T34/85, but maybe that is what custom commanders are for (if they ever come)
I'd rather they work on revamping some of the existing ones:
Urban Defence
Soviet Industry
I believe they are working on Industry
I feel a very great need for shock troops + T 34-85
I offer this option:
mechanized tactics
0 - access to T-34-85
2 - shock troops
2 - Access to large smoke bomb (any tank can put a smokescreen, like Churchill)
7-8 - T-34T ARV
two modes:
- Mobile,, can restore tank for resources
- stationary, repairing tanks
12 - IL-2 strafe