>>406872>all the buildings in the USSR were built in the traditional style They weren't in the first place, they were built in a variety of styles, most of which wouldn't even count as "traditional" in Russia.
>without the go ahead from StalinHe was the general secretary of the party, not minister of architecture or construction, yeah this wasn't under his jurisdiction. The prizes being given is the closest his personal taste could be influencing the architects but even then they would have to guess what kinda shit he'd like and majority of buildings weren't designed with prize in mind anyway.
I get that you like the era's style (I do as well) but there's no reason to both classify it as "trad" and attribute it to tastes of a single guy, it reflects the taste and aspirations of the whole of soviet society of that time.