Eh, it works, buts its a bland fix. To me personally, being able to have 2-3 tanks for each of my opponent's is a much more interesting design.
But you won't have 2-3 tanks for each of your opponent's. It's very hard to keep T-34-76 tank groups full alive, when you using them. Axis is full of all kinds of possible AT - from Schrecks to Jagdtigers. I remember, when I used it myself with old soviet industry. Making 6 T-34-76 tanks and faceroll, that was cool. But even then, Axis could resist to such assault, cos Panthers are well armored and move fast enough for to not to be encircled by T-34, Schrecks killing 1 your T-34 each 15 seconds, etc...
In other words - for to make T-34-76 it should be spammable in level "easy to get fast 4-5 T-34-76", cos only in 4-5 numbers they can be effective. For to make them that spammable they should cost even less, than they are now. At least in MP.
But I belive, that design "poor units, which you should blob/spam for to make them effective" is wrong design. 95% of comunity hates blobs and spams and forcing Relic to make such strategies weaker, look at Maxim.
So, with such desing USSR will be less and less powerfull, if that "anti-blob/spam" protests will continue. So, just put in T4 T-34-85 and SU-100. Simple, fast, effective.