In most maps, you will encounter a opponent usually in medium range. You have three options with limited time when you find a opponent in this situation, assuming you have a assault rifle and he/she has akimbo 1887s.
1. Runaway
2. Simply aim and shoot to accurately take down him/her down.
3. Get closer for a knife kill.
By the time you start aiming and shooting, you're already shot down. Why? Akimbo 1887s can kill at this range without aiming down your sights. The shotgun also literally clears anything in the cross airs at close-medium range. Don't even think about going for a knife kill, you'll be long dead before then. So, in this range, the best option is probably to run away, if you can outrun your enemy.
I going to have to agree they need to be toned down a tad. However, they still should be the strongest of the shotguns simply because they take some time to take out and there is some time you have to wait before you shoot another bullet (Moreso than the other shotguns). Right now, it's overpowered at CLOSE range.