allies have very much air recons in their abilitys. I think you know that.
And this can acquit OP ST? Then why ISU-152 got different shells and removed ability to focus sight? if axis have best AT in game (shrecks, paks, elefants, jagtigers, KT and so on)? Maybe because old ISU-152 wiped all AT squads from another side of map with laser accuracy?
ST no need high level skill, after some practicing you could wiped units witl little efforts. Just use one squad to bite and shoot enemy. You can't see ST in fog of war (or you need choice RIGHT doctrine against only ST). Just shoot in maximum range and AOE will do everything for you, if you shoot to tanks, enemy can't retreat, and infantry have very little time to react on rocket.