Stalling late game from Sieging makes the game too long...
Azir We've (probably) got a late nerf going into 8.3 for Azir, targeting his waveclear/AOE. Plan is to reduce his damage on secondary AA targets, hitting both his laning power (ability to push/counterpush and roam) and ability to stall out sieges late game.
So Let's Nerf Azir because of his pro plays...
We need more champions that stall the game soo that your team can catch up why the heck would you nerf that? The game is soo snowbally enough that having a champion to help your teamates is good enough.