Keep in mind this unit comes inside a commander that gives buffs to units near the FHQ. As a result, buffing this gun has serious consequences since it will make counter play near impossible. If you make it better against Infantry than German players cannot use MGs to control conscripts around the house. If you make it better AT than it always pays to go this commander since you don't need T2 for any form of AT.
Remove the unit and possibly add some more late game (Howie would be good) to a commander which is all or nothing after the 8 minute mark.
I would be concerned a year ago, but not now
FHQ got indirectly nerfed to oblivion with the starting resource changes
you know, I already made a thread that showed the changes I wanted for M42, FHQ, and a few other useless abilities with a mod that showcases those changes, so I'll post the link to
that thread instead.