I think the smallbore and other related "OP" shotgun perks were intentionally made to be this way in a previous update. Could be wrong for sure but I'm on my phone and can't go through all the effort of digging lol
English
-
It's not just shotgun perks, it's mainly perks on sniper rifles. No one seems to complain about those since the player benefits. However everyone seems to have issues with shotguns still...