The T-28 DID see combat in WWII nonetheless Renaults were used by the Germans in low supply areas and that was the First "successful" tank to be made. The T-28 should be a starters medium tank, its armor was thin so it isn't a superstation but it is a good defense busting tank (Think of the uses at a Lyon map) that was very successful. Perhaps letting it be buildable from the Wep. Sup. center , The fact is its not meant to challenge the T-34 just provide support. Add a flamethrower to make it a OT-28 if you still think they don't need it. :p
The M3 was a very good tank, it was simply that the Sherman got produced so quickly. Off topic though.
well not really I'm defending the T-28 (small tank) and he brought up the erm.....M3 thats is. (small tank) so Im in a sense defending small tanks and in a sense thus defending the T-28