I'm just going to be honest: The wall is fucking busted.
There were four different occasions in my last game alone in which the enemy champions simply ignored my wall. Not only suffering no damage, but also not being pushed back and just walking through the wall. There was no rhyme or reason to it - I am honestly unable to just point to a replication of this bug and say "That's the reason right there" because it has presented no consistency. When the wall HAS bopped for me, the reaction is, firstly, delayed - there's almost a full second between the time that the push ends and the enemies actually become bopped, and on several occasions champions that were being pushed by the wall were able to cast a spell or AA during the duration. Now when it doesn't push or bop, it straight doesn't - that's it. I have had enemies just walk through the push. Not dash, not flash, not roll or jump - I mean autopathing walk directly through like I had done nothing. This happens a lot more if an enemy is close to a wall, you don't hit them dead center, or if they're walking away or to the side.
As it stands now, Azir has absolutely no defense against his counters - any champ that jumps on him is free to, and he has no way to avoid it. His ult is mechanically broken, and can serve as little more than a delayed Anivia wall that doesn't even cover as big of an area. His functionality is straight unreliable.