The only issue here is Scott short barrage
I do feel like a lot of potential USF problems inevitably come to down to the Scott being underwhelming. Like in the hypothetical game where you teched LT and went for something like Heavy Calvary that has no offmaps then Pak 43 will probably give you some problems. In that way I feel for OP. On the other hand there are many many times where it's super easy to wipe Pak 43 off the map - especially if it's in an aggressive position. All in all I think it's a fair balance that is standard Commander pick and counter pick fare.