The damage of the double barrel shotgun is very poor even on short distance and can't match other weapons even in situations he MUST win!
Both Sawed off and both long version
Too many ways and too many times happens that you won't kill someone either at 0 metres with both version.
Worse scenario of today has been this: 6 shootguns shoots (2 shoots at 20 m, 4 at 10 metres) to a guy without cover and didnt' kill. What does he had instead? M4.... off course he won.
Pellets doesn't hit? Hitboxes problems?