Hi. Nice discussion with lots of good arguments (definitely this forum is not garbage as sb wrote earlier)
I'll add my bit
From my perspective the key of the problem is that USF faces two completely different opponents (OST and OKW). Ost is a static and 4 man squad army - mortars and indirect fire weapons decimate them so much that balance team tries to tone such weapons down. On the other hand, OKW is highly mobile and much better close quarters. If they keep moving, indirect fire needs to be much more potent to even hit them. This leads to problems with balancing the game.
It also partially answers the reason why ost mortar was laser guided - to be effective against moving USF units it had to be because against players who move their usf infantry, mortars are generally bad (USF can move a lot as their dps on the move is few times higher that, for example, of grens). Of course USF players who camp suffered from laser ghuided mortars but I think that was the intention. (A fun fact is that there was a patch a few years ago when ost mortars really quick fired to compensate for playing against units that are good on the move from USF and Sov - people really complained and colled them turbo mortars - still back then the same issue was being addressed). I don't think it is easy to balance stuff like that and there will always be some problems here. My solution would be to maybe make grens 5 man squads after maybe last battlephase or like rear echelons with vet 3 - then it would be so much easier to balance indirec weapons such as mortars, pak howies, scotts etc. Still, lets test the new patch as it looks promising and thank you again the team for making the game even better