The Soviet's are designed to lack flexibility relative to the Germans. You aren't meant to get more than 1 late tier building.
Sometimes i think the whole game is designed to lack as much flexibility, Options and variety as possible to make it shallow and boring with low amount of strategical and tactical deep.
With the soviet building cost of 140 fuel i can already tell you guys the future strategy for ost Players: Drive with a scoutcar to soviet base and then spam Railway artillery on the soviet T3/T4 building----->they will lost 140fuel at once and are forced to spend another 140 fuel to rebuild it again----->which results in a soviet lost.