I don't understand "has Xur failed you" posts or comments. The point is to augment with random inventory of exotics, which may/may not complement someone's collection. Nonetheless, he still has useful items that a player can use, eg glass needles or 3oC. Regardless of whether he had a shiny new exotic that is missing from your personal inventory, there's always someone else out there that can use something. So, if he doesn't have anything this week, consider it an opportunity to save coins.