If changes on the PBE to Azir persists, he will most likely fall into bottom tier.
Shurima's Legacy ( Passive )
No longer grants Will of the Emperor (attack speed boost)
Arise! ( W )
Passive: Gains 10/20/30/40/50% attack speed.
Active: Azir summons a Sand Soldier for 9 seconds. When Azir attacks an enemy in a soldier's range, the soldier attacks instead of Azir, dealing 50/60/70/80/90 (+0.6 AP) magic damage to enemies in a line. If multiple soldiers strike the same target, each soldier after the first deals 25% damage. Soldiers attack even if Azir himself isn't in basic attack range.
Azir can store up to 2 Sand Soldiers at a time. A new soldier becomes available every 12/12/11/10/9 seconds. Moving too far away from soldiers deactivates them. Sand Soldiers expire twice as fast when near an enemy turret.
Shifting Sands ( E )
No longer knocks up enemies or grants shield
The passive change to W is fine, but no knock up/shield on E? This pretty much ripped out a huge part of his kit, as this allowed him to commit to an all in, and do your combo's. Now if you E in, you will most likely die as you wont have your knockup to help you CC the enemy, and you wont have that shield that could neglect some sort of damage. Also his W base damage is down to 90 from 170.