Azir doesn't need a nerf!
Too many threads about Azir nerfs and the people complaining have not played Azir.
He's a very high skill cap champion that requires massive amounts of patients to learn and master. If you actually take the time out to learn how he works you'll understand how to counter him instead of running straight for him at his tower while he ults you into it and you QQ that he's OP. He's extremely glass cannon and any CC with burst will take him down in a second.
Azir doesn't need nerfs or any changes, almost every champion can dominate when they're fed.