Xúr I love, but I think he should change. I think he should sell an engram once per month and a weapon one every three months. They should make the exotic drops different for each gun. The Last Word from crucible or Invective from strikes.
You don't
have to grind because the drop rates are increased in these events. Xúr should still sell 3oC and the other things (glass needles ect.) You have to earn your exotics not buy them.
Edit 1: This is an idea for Destiny 2*
Edit 2: You don't get exotics off legendary engrams*
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You earned your exotics by : - killing a level 2 dreg in the cosmodrome when it dropped a legendary engram that turned into an exotic. -getting the lowest score in a crucible game because you didn't even try. - being a dead orb in a hard mode raid the entire boss encounter. ^ the lamest ways I've seen exotics given in this game. I guess that's "earning" too right? There's a lot more effort in getting the damn strange coins than rng drops. Hence Random.....