pretty much this , unit pathing is so fucked up - they clump together all the way and get reckt
It also doesn't help that the ISU has one of the best aoe radii of any tank at 6. For comparison the brumbar has a max radius of 5 while the KT and IS2 have one of 4. Large aoe radius + small German squads + squad AI makes for rage. Knocking the aoe radius down to 5 might make the unit more bearable while not fundamentally changing what it does.