I personally think Xur is an awesome idea in the game, to help people get stuff they don't have. I'll only hate Xur if he sells Gjallarhorn for anything less than 100 strange coins. Other than that, I don't mind, and use him to get exotics for my other characters. Explain your opinion down below.
Edit 1: for the 3rd selection, it's supposed to say "advantage?" at the end. D3RP
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Way I see it he's more of a necessary evil for unlucky players. If the reward system was changed to give better loot based on how the player did then Xur could be irrelevant.