You are only increasing the skill cap level on Azir by making these changes.

Clearly all of the damage from Q has been taken away and shifted to his W (typical balancing). Now Azir has to stay in a much closer range to do any considerable damage. This just pushes his skill floor cap even further apart and i am not so sure if riot actually looked at his winrate before they came up with such changes.

Lastly azir has insane mana costs early game, and the new W passive will be a nightmare to use early game. Not just that, the enemy will be able to predict an incoming attack as soon as it sees the 3 soldiers. With his overall range decreased azir loses out on his little poking abilities in midlane and this actually will push him out of mid meta even apart. Adc's won't let him survive if they get in AA range especially with BS lifesteal.

That new E seems so damn pointless. Especially the generation of that new soldier. You wont get time to W 2x more to use his new passive.