Can we get some context on Azir PBE nerfs Riot??

Azir is one of my main champions and I know he's super strong in tank heavy meta because his R can deny enemy engages and keep himself plus ADCs safe so they can shred through tanks. I get that because the meta is heavily favoring tanks right now that champions such as Azir who can effectively manage them will likely get nerfed to compensate for their being strong right now, however I disagree with nerfing his R as heavily as you are. Shaving the wall duration down to 3 seconds (as of May 18th patch) seems a bit severe especially since its is such a drastic nerf compared to live. I say just take the wall duration scaling off and see where things fall, if you need to nerf it again do so but I don't want to see heavy handed changes ruin my favourite gilded Chicken [zombie-nunu-tears]

Side note I kinda get taking away his W damage against towers because with his high AS and great wave clear you could kill towers pretty quick which is supposed to be the job of AD champions and Ziggs, and the speed up on his R wasn't THAT noticeable so taking it away won't have as much impact as taking the duration down by 40%. I am concerned however with the change to his W because there was a glitch a few patches ago (unsure if its still there) where if a Soldier is in attack range of a structure Azir cannot attack it at all, even if he is in range of his normal auto attack the soldier interferes with his ability to hit the tower meaning you need to burn Q to get it out of range or wait for it to disappear.