I gotta say, I don't like half these changes.
I appreciate that they're trying to balance the HVR, but I don't think linking the damage to the accuracy will fix it. Not to mention that this change sounds like it will effect all snipers, as indicated by "...general changes to sniper and shotgun categories." While it may help reduce its effectiveness in close range (quickswitch), its effectiveness in any range past like 10m will remain unchanged because people already need to stand still for about a second before the HVR's accuracy allows them to hit past short range. Linking the damage to the accuracy, in this case, doesn't do anything.
The shotgun changes sound unnecessary, but I suppose it's not too bad if the damage change isn't big. For making it more forgiving, fine, but I don't agree with changes to how shotguns work for the sake of compensating for server performance.
Giving the Misery more overkill damage sounds good, but changing the accuracy curve sounds dubious. I hope that by "tap-fire" they actually mean "burst-fire," because that's the original intent of the gun. Similarly for the Cobra, I really hope they don't remove the accuracy curve on the Cobra.