I really like the structure of the soviets, they play very different from all the other factions, bring them more in line with the ostheer structure would would take aways what is really unique about using the faction. To say that the design is inherently bad is an opinion as it is well balanced and you can certaily win with a variety of strategies, some more powerful than others but that can be said about any faction. Also the su 76 is great and I love it. Get it vs opponents that go heavy inf as a stopgap to su 85, kv 1 or t3485, it's free barrage is VERY underrated.
I don't see why anyone would want to limit the amount of variety in army composition. Limiting this will just double the amount of medium tank spam people are always complaining about (shermans, used to be panthers...). I'm against anything that limits tactical options.