The game is based on exclusion. 315+ requirements emblems certain guns no squeakers only certain strats. Nerfing the ghorn wasn't about exclusion it was to up the grind and waste players time. Thus why bhammer and ibreaker got hit as well. They allowed players to melt bosses too fast and bungie has dedicated year 2 to wasting as much time as possible. The nerf to ghorn had 0 to do with exclusions.