Man, I didin't play soviets 1v1 this patch so I wouldn't know what you should do, I'll try them myself on 1v1.
BUT what I can say from other game modes where I played them is that they are feeling quite UP this patch. I mean, I find it verry difficult to survive with them and actualy win. The importance of T34 presence in t3 is now obvious. Also the call-ins importance. You don't have a generalist tank in t3 while ostheer - and now okw - have it. You don't have the proper tools to deal with what axis can throw against you at different game stages. Everything is comming far to late now, and what you build from your soviet t3 is no match for what ostheer can build from their t3 for instance. Same story with t4. Maybe the things were quite similar in the past but now, somehow the difference is even more obvious, and I think it is because of changes in teching and building costs. Let's face it, SU-76 is not an offensive weapon as T34 is. What is the point to have T34s in T4? To bring a vanilla weak medium tank in lategame? What to do with it? Before patch it made sense, all was about timing, you could turn enemy lines upside down with T34 rush and agressive thinking. Furter, the soviets call ins helped to compensate against heavy german armor. Now, by the time a soviet player has an T34/85, the german player will have a panther. By the time soviet player will have an SU-76 the german player will have a PIV. The quad feels now as the only chance for soviets but can be efficiently countered just with some ostheer t2 combined tools, not talking about stug, if the german player manages to build it in due time.
I don't love soviets, but the changes for them created balance issues in my opinion OR I totaly have no idea how to play them in this patch. Could be that too, but still logic tells me there is something wrong about them now.
This is all completely wrong. First of all, tiers have to be compared by fuel cost, not by number. Ostheer t3 is equivalent to soviet t4. If a t34/76 is rushed, it will arrive at relatively the same time as a p4.
T3 is a light vehicle tier which has no equal in any axis army. It gives access to light armor that can give enormous field presence in the midgame, whilst the su76 is currently capable of defeating any tank in groups of 2-3.
In terms of fighting okw, relying on maxims and the new and improved ml20 will get you far. Maxims are hard to counter for okw due to the hard time okw has clearing buildings, and the ml20 can decimate okw buildings, all the while being safe in your base. (Okw only has scavenge arty to kill arty in base).
SU76s also do very well against anything short of a jp4. They will give you mobile indirect fire, as well as a good at punch. The M5 AAHT supporting your maxims will also be hard for your enemy to push back.
All in all, you never really will need to tech past t3 as soviets vs. Okw. T3+T2 gives you just about everything you will need. Callin mediums like the m4c sherman and the kv1 will complement T3 builds quite well.