To make Azir a more viable pick..
I believe he needs a change to his W. After playing him for several games I have found that my biggest problem is I cant kite. I find that whenever im being chased if I try to summon a soldier I just close the gap for whoever is chasing me and inevitably end up killing myself. I think that if you were to make his W like syndra Q or W where you can cast it while moving it would do wonders for him. And while helping him out, he will still be a hard to play champion who is only good if you know how to play him as well as not being SO good that he becomes FoTM and soon to be nerfed.