I'm not entirely sure how viable u-turn is on your Xatu. With a base attack score of 75 and nothing in the way of EVs in attack or speed, u-turn seems like it wouldn't really influence the next attack, and in fact would leave Xatu open for one more attack by whatever you're switching against given its base 95 speed. I guess you could use it to fool someone into attempting to get an entry hazard in on the turn you're forced to switch, but I can't imagine it comes up enough to make it worth a slot.
You've talked about getting more access to haze: I'd maybe suggest removing u-turn for this. It'd leave you without offensive moves, but you're a Xatu and thus immune to taunt.