In the game, the JS-2 still lose to a inevitable Tiger tank which is much cheaper, that is the problem
this is obviously a more extreme example, but thats like saying its a problem that an ostwind loses to an su85 because theyre the same price. not quite the same but you get my point.
the soviet heavy tanks are far better than the german heavies against infantry. thats why they arent as good at AT. youll have to get a dev to answer why they chose to make it like that, but as it is now, you cant buff their AT ability unless you take away some AI in the process.
IS2: 2.86 distance scatter, 7.5 angle scatter and 5 AOE
ISU152: 13.2 distance scatter, 5 angle scatter and 6 AOE
Tiger: 4.3 distance scatter, 7.5 angle scatter and 2.5 AOE
Elefant: 10 distance scatter, 7.5 angle scatter and .5 AOE
the tiger is pretty much a slightly improved p4 against infantry (about half the distance scatter and .75 faster shooting speed). the elefant is obviously worthless against inf. the soviet heavies just put them to shame at AI.