has almost all, if not all, qualities of a great mid laner. He has decent range, oppressive laning phase, wave clear, poke, dps, burst, zoning ability, game changing ult, mobility, good roaming potential, shield, good at all stages of the game, hyperscaling AP carry. The only drawback that I could think of is his high skill cap, a great Azir will just destroy you. His kit is too overloaded and has almost no reason to not pick him.
his win rate in plat and above is currently 52% he has a lot he can do in his kit but it seems like it does not matter for the higher elo of players compared to someone like karthus who has a 54% win rate in the mid lane who has very little his kit can do even the experienced players at azir dont even make it into the top ten spot for mid we need to give it some time and if he rises to the top ten position i will agree with you but as of right now there is nothing wrong with azir
heres the source of win rates http://na.op.gg/champion/statistics
Reminds me when the forum complained when Gnar was buffed and became meta...
Azir gets outtraded early. That is why he tries to W AA Q AA to get TLD then back off. A big reason he has an "oppressive laning phase" imo is becuase people are too scared to trade with him early.
He doesn't have scary damage early. If you get even a little ahead of him goldwise he can't poke you without being in range for you to burst him.
I think a big thing is just that he's been out of the meta for too long, and barely anyone knows what to do around him.
And I can give you plenty of drawbacks.
He has no hard CC save his ult, which means he is not one of the best mages to gank for pre 6.
He has high cooldown spells early game that his damage depends on.
Late game he is still squishy and cannot outtrade another carry without help or pulling a surprise shuffle from FoW because his lowered range puts him in the range of marksmen, who have crits and lifesteal while he lacks those traits.
Also don't separate poke, dps, and burst in your OP just to inflate your list and make it seem like Azir has more strengths than he really does.
I can name mages that burst faster than he can, can lock someone down, i.e. make picks better than he can without putting themselves at risk, who can sustain in lane better, who can poke better, siege better, etc.
I think you are just overhyping him to be honest.
2016 called they want their posts back
Just outrange him with 
oppressive laning phase
Only if you are melee.
wave clear
As most mages.
burst
As most mages.
poke
As most mages.
dps
His role is to be an ability power carry so you have to expect to have dps.
zoning ability
As most champs.
game changing ult
As most champs.
mobility
True but its predictable and it has long cd.
good roaming potential
Excuse me? He doesnt have something like taliyah passive so his roams are more or less the same as others champions that lack out of combat movement speed. Or dashes. Or teleports.
shield
Which last for 1.5 second and exists only to e in the enemy. Orianna can shield anyone and give resistances though for less shield. Lux can potentially shield her whole team. The same applies to karma, if you count her as a mage. Shields as mage is not something weird.
good at all stages of the game
Well yea not really.
hyperscaling AP carry
Well as a general rule of thumb carries hyperscale to late. They are called carries because late game they are literally monstrosities.
This Azir is actually worse late game based on stats. He is better early to mid but as you start reaching late game he starts to drop. His ult only stops a person once then most champions with a dash can stop him. He is stronger in lane, yes, but he isn't as bad as people are putting it out to be.
Also rune changes will legit have a massive effect on him from my time on PBE so I think we need to chill. He isn't breaking the game.
Azir outclasses most of the roster when he's a good pick honestly. Most champions just aren't capable of pulling off the kind of plays he can make.
Azir is WAY overtuned right now. Late game damage is way to strong considering his poke. You get hit with a Q late game..you are half healthed.
Imo, Karthus has no bad match up he is the real I outclass everything in League. you can have 4 AD and 1 karthus the enemie team will still build pure MR because of the amount of Damage Karthus does.
The problem with Azir is very similar to every other hyper carry in this game. And that is: He is strong early game. He is strong mid game. He is strong late game. And to top it all up, he has ranged attacks.
Imagine Darius or Renekton or even Phateon having their current power in their kits in early and mid game. But also having very good scalings to the point they are as strong as a Fiora on 6 items. That would be broken right? They would get nerfed to the ground asap, right?
Well, that's what riot allows with Azir, Ryze, Kog, Tristana and others. And unlike the guys above who have the disadvantage of being melee. Riot loves giving ranged hyper carries the ability to be lane bulies. And that's just absurd. But hey, that's their "design philosophy".
Overloaded kit? 
say hello.
azir is rising winrate i just checked again he is going up pretty fast if a nerf does happen which sense hes in the top 10 i think should happen his all in should be nerfed i dont think his late game should be gutted
They should have been more aggressive with the range nerf to be honest.
