Azir Scale Too Hard For All his Tools?

Kind of just noticed this from pro play and being carried by so many, I don't play Azir and I know he's very difficult, but it finally dawned on me that Azir does a but load of damage for a mage that actually has an escape.

I feel like his existence alone invalidates the likes . All high damage mid lane mages, but they lack an escape. And for the most part just bring insane damage, with the exception of Cass. The mage update is going to flesh out all 4 of the mages I mentioned but I still feel like Azir will still be king. Unlike a lot of casters he has the ability to engage with ultimate or peel himself or his team and even provide some map control with his Sun Disc Turret.

ADCs that hyperscale are mostly immobile that only really bring damage, . Vayne has low range and a short gap closer, Jinx and Kog are immobile, Tristana....is a bit extreme but all she brings is damage.

Let me know if I'm missing something please.