Azir nerfs discussion

Hello,

I've just seen the Azir nerfs on the PBE and I wanted to ask if anyone knows why exactly Azir is getting nerfed. I thought of a possible slight nerf and by coincidence I saw Redmercy's (a Youtube guy, who makes Gameplay/educational LoL videos) video about the Azir nerf and his suggestion to just remove the ability to use W on turrets and also remove the ulti's movespeed for allies.

I mean, 3s from 5/6/7 seconds wall is pretty hard. Is the wall so op that it has to be nerfed? Imho Azir is perfectly fine and fair as how he is atm. A beginner Azir will never be able to play this champion so that you could call it op, and imo a player who spend times and times to learn all the tricks of shurima's sun birdy should be rewarded with a really good - maybe even above average - champion.

And isn't Azir like Vayne? Shut him down early, deny him farm, gank/all in him whenever his E is on cooldown and you will have a 4+a chicken vs 5 game. Does Vayne need nerfs? I don't think so (yeah, maybe the true %HP DMG is a thing but let's overlook this one ;)), because of the same reason Azir shouldn't get nerfed too hard. In the late, Azir has a much safer distance then Vayne and magic DMG which is (afaik) always better than AD.

TL;DR: I'm completely fine with taking away the W turret-mechanic and the Ulti's movespeed, even 1/2 seconds from the duration, but I think this nerf is way too hard. Suggestion: Ulti's duration: 3/4/5 or even (if you don't want it to scale) 4/4/4.

Thanks for reading.

PS: I'm just a silver player, but I "main" (smth around 25k points or so) him and I think I understand his a little bit indepth basics, if you know what I mean.

PPS: With the PBE changes I could even imagine Azir only putting a point in his R at level 6 and after that no more, because you need the wall for it's utility, not for it's damage. Although the damage is fine. It was just a random thought that came into my mind while writing this.

Ah, and because so many people say "Azir has become overbearing" - the Champ didn't get touched, why is he getting "OP" just because he's played at the MSI? If _____ (insert League's currently worst champ) was pick/ban at the MSI would Rito nerf it because he is "OP/too good" now, even though he has never ever been played and was always laughed at?

/Edit The Poll cut the rest of the answers away, It should be:

2.Keep the Ulti's duration. 3.Yes, but a bit too much, maybe give him some slight buffs to compensate the nerfs? 4.No, the nerfs are completely unnecessary.