Besides the fact that we are trying to over-engineer a solution to the problem (also don't agree with the proposal) i think i should clarify the point below.
-Dshk HMG has e better weapon profile to become unique in the actual game scheme. Being said this i suggest the following rework:
Rework Dshk as a "self protected" HMG with high calliber munition. Aestetically it already has a shield cover, when it sets up it gets green cover in the direction its aiming. This could help to deal frontal assaults (as they happen with maxims) and also become a posible way to hold off LVs as Dshk has big calliber and an ability dedicated to that.
Since Dshk has its firing arc so narrow, flanking it is possible and also necessary since it could resist so much frontally. They wont be spammed because it would take a bu**load of them to cover big areas.
If it's meant to work as AT guns, i'm sorry to say that we shouldn't rely on a function which is completely bugged.
First, due to size and crew spreading, the only one benefiting from the cover should be the operator of the weapon.
Secondly, while targeting may seem random at most times, the priority should be against the crew members instead of the operator unless the are no other valid targets.
Thirdly, as i said before there's a problem with how AT gun cover work. They basically don't give cover 90% of the time and that 10% requires specific scenarios for it to happen.
https://www.coh2.org/topic/66776/at-weapons-for-okw/post/646618