Seriously, what do these people expect? If you've been here since Day 1 or have simply played a lot, chances are you already have almost all the exotics. If that's the case, then what, in all honesty, can Xur do for you? Complaining because he hasn't brought the one piece of armour you're missing is stupid. His inventory is random (or at least, mostly random), and not tailored to suit your needs.
Every week I see people saying that he's brought crap or they have it all already. If you are in that situation, then guess what? Xur isn't for you. He's for players who are still trying to acquire the exotics they need to be competitive. If you stay up every time to watch his inventory, despite the fact there is only one possible thing he could bring that you want, you're the one at fault.
Seriously, why don't people get this?
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Excuse me bungie but i just bought the exotic engram that guarantees a new exotic and i got a vigilance wing which i got 2 or 3 seasons ago