The arty of the panzer commander is rather lackluster as it only gives 5 shells and rarely kills anything, and yet you act like this is the only form of arty in the game. if i wanted to counter at guns i rather use the smokeplain that's available in the same commander. So no panzer commander is a decent ability.
because you think its fine to let your AT guns sit in the middle of artillery fire where two shells can probably decrew a whole ZIS gun, and you can cast it on atg range
you are forced to relocate or lose the AT guns, can you use your brain and realize that moving AT guns mean that the attacking tank gets to ADVANCE? Not get shot at by two whole AT guns?
would you see USF's major walk up and cast artillery on your support weapon and decide to STAY in it? besides, the panzer 4 and king tiger both have exceptionally good anti infantry with their main guns anyway