The gun is actually more balanced than it was previously, and given the current state of the game, you'll only get smaller maps 1/2 screens max with at most 6 players. The shotgun is right where it needs to be currently.
In PT, Spray and Pray is kill an enemy 100 feet away, which can be achieved at 20 tiles. So each tile = 5 feet. It's clear that the Abraham L2K is ridiculous for a real shotgun. The choke pattern shouldn't be 25 feet for a 20 yard shot - that's absurd.
shotguns will never be truly balanced in any game imo. if they one tap up close, people get mad, if they don't do a bunch of damage from afar, people get mad. if they do damage from afar, still mad. I think it's in a good spot.