The Gunslinger subclass has a lot of perks that take effect after pulling off precision kills. Players that are skilled shots, and can pull of precision kills reliably, should be drawn to this class and be rewarded for their skill. The way Bungie can do this is by doubling down on these perks and making them more effective.
Increase the effect of perks such as Gunslinger’s Trance and Chain of Woe. And better yet, change these perks so that nearby allies also get to reap the benefits. That would give Gunslingers some real utility outside of being the person that shoots a Golden Gun every couple of minutes. Gunslingers are supposed to be lone wolves, but right now there’s just too little synergy with the other classes. Making Gunslinger’s Trance and Chain of Woe area of effect abilities would turn Gunslinger into a valuable fireteam member in between Golden Gun shots.