I switched to the sawn off to take out people when they insist on using nothing but the shotgun, otherwise I use the lancer or any power weapon i can get my hands on. So now if people want to get close they will have to risk being blown away in one shot.
But no doubt they will nerf it because people will cry how over powered it is even though it has no range and only one shot, but before they nerf the sawn off, half the range of the gnasher because the range on it is a bit of a **** take at the moment. I was rolling and sprinting away from someone earlier and I was still taking damage when he is just walking and aiming down the sights.
If they can roll and dive through lancer fire to get close you should atleast be able to roll and sprint to safety without taking damage from 2-3 more shots.