So Azir is definitely strong again, probably a little too strong. Here's what you do this time:

Before I make my suggestion, let me say it's not his lane phase that is the problem. While he's generally pretty safe, he still had clear weaknesses and strengths during the lane phase (unlike before to an extent).

My issue with him is how powerful he is late game at several different things. Because of his sun disc passive and how strong his soldiers are during seiging, he's one of the best seiging champions in the game (potentially the best tbh). He's also a fairly powerful teamfighter but he does have ways to be played around teamfights.

This is where my issue lies: the duration of his ult, especially at ranks 2 and 3, last way too fucking long. 6 and 7 seconds respectively - that is an eternity in a teamfight. One of the first things you can do, without nerfing anything else and potentially making him trash tier again, is lowering its duration to 4-5 seconds at all ranks. It already has a ton of power with its displacement and I'm fine with this because it's range, if I remember correctly, is only 250, meaning he has to get pretty close to the action. But 7 seconds, that's just too damn long for an already unbelievable zone controlling mage with insane seige.

So this is just a suggestion for now and if it's not enough, look at other areas. But this is a good start without ruining him and allowing him to keep many of his strengths.