Soviet Shock Army in T4? Shocks, ppsh's, 120's, ML-20. - On maps like Steppes it might be tier 4 but on City 17, Lienne Forest, etc, it seems much better than that. The worst part about it is Relic's decision to give everyone CAS which makes it hard to use ML20.
Well everything in Shock Army is so gardening expensive that if you are actually using everything in it you can't really afford very much of anything else and you'll have an army lacking AT and armour
Shocks, 120mm Mortar, ML-20 are all manpower heavy, and if you are getting Cons with PPSH they are going to bleed from getting into CQB
If you are on the right map and/or in a team that can cover the other bases then fine, but that makes it quite situational and it lacks any call in tank of it's own or anything that helps to fight Axis armour.