Shotguns in the game feel out of place in the division 2. The percentage melee damage on the guns are kinda useless. If they had percentage weapon up to 10% and 5% in pvp depending on how close you got. feel like then id see more people wanting to run them in pve. Maybe give them stagger like in the first game.
Just feels like they are filler guns with a bad bonus add on to them. Dont get me wrong i agree with you that they are good at killing things from normal to hard. Its that they could be better if they had a bonus that actually mattered. aside from the shotgun bonus i dont know of any other buffs to melee in the game.