Bolshoilover, before Vasiliev, Fadeyechev, and those who followed was the Era of Yuri Grigorovich. The 'Age of Spartacus,' if you will...the great big Soviet Hero. The entire esthetic was big, all-powerful, Soviet, oomph...less finesse and no eye towards happenings in the West. Simple answer to a complex question.
If they ever revive The Bronze Horseman it will be a Bolshoi production. Despite what all the people in Saint Petersburg think, it was the Bolshoi version of this ballet that is best remembered by old-time Russian balletomanes (I believe Stalin favored this version, too).