Several changes have been made to shotgun weapons across the board -- resulting in a list of changes similar from weapon to weapon. The following list of changes apply to all Primary Shotguns with exception to the Phage:
Increased damage across all shotguns.
Damage after projectile falloff has been increased for all shotguns.
Some shotguns have been given improvements to reload speed.
Some shotguns have received improvements to their projectile speed.
Death at close to mid range will now toss enemies into a forceful ragdoll.