My opinion on how to make Azir's playstyle better
After playing him for one day I realized that his W Q feels slightly laggy. Either make it faster to make it seem less laggy or extend q range. For example when trying to get away, w q e. However it is so slow when you have tier 2 boots you might as well walk it unless you go through a wall. To fix the problem, either extend the range on q, increase the speed on the execution of his moves, or something else.
It would also be nice but not needed to have his soldiers scale in how long they last. If the enemy doesn't stop you, you could have a lot more soldiers to pull off more tricks. In addition, Azir would be gated by whatever mana he has so he can't infinitly spawn soldiers.
Azir has the potential if this fix comes through to pull of insane combos and be a threat.