Im not sure why you wouldnt just make usf mortar a copy of soviet one....
FTFY.
its not like a t0 mortar is game breaking.. T0 AT gun isnt gamebreaking.. USF needs to go cpt for one...or go a useless doctrine..
The mortar actually was game breaking at worst and imbalanced at best. T0 AT gun is not gamebreaking, but it really undermines the importance of teching making it awkward.
Or maybe you could just move its range bonus vet to 2 or something. It could use some love.. the range is a joke also... a mortar without range just seems so stupid to me lmao.. even if the accuracy completely goes to shit it should still achieve greater range.
Alternately, it could've feasibly stayed exactly the same, but been put into LT tier.