I suggest the Schewer should have a prioitize mechanic which is similar to how Relic allowed the resource focus for the OKW before they ripped it out.
There are three kinds of focuses, air, armor, and infantry. Whatever it focuses on it will shoot that focused unit. Then there is a time limit until the OKW player could switch between focuses.
For example, focusing on infantry and then a Sherman appears out of nowhere. OKW player switching focus will make the schewer shoot the tank, but if infantry come out of nowhere as the tank leaves the gun will not shoot them.
And why not? Static heavy AT defenses would work very good for USSR. Such as static AI defenses.
They're anti-tank gun is decent. No need to go further.
At this point, they won't spend time,resources, and manpower just for a single person. Tweaking things is rather easier than making a new unit and voicelines.
I still don't see why they needed a mortar at all. The faction wasn't designed with one and wasn't particularly struggling.
Edit: As for where it stands at the minute, I do think the -20% scatter is a bit excessive for a vet 1, especially considering that (in general) units get an ability rather than a flat out stat buff at vet 1.
It was to break the same old opening every USF player goes through. As one of the USF players I was just hoping for a smoke dispenser which didn't eat munitions if I rely on smoke.
Somehow Relic 'overlooked' the intended stats and turned it into a beast we all know today.