Wouldn't a couple of mortars/barrage ability/howitzer force you to break up that blob and attack though?
Early/mid game, the only real viable option out of them for the Soviet is the 120m mortar, which means one less frontline squad/sniper for the soviet. Spread out a bit more obviously if they get a mortar and push harder or get your own mortar as the 120m I find a bit crap.
It's not a masterful strat I admit, but i've found some joy with it on some maps where the cutoff is harsh on soviets.