Don't nerf azir because of crap MSI metas
Azir is such an awesome mage, he NEEDS the wall because every champion has mobility. It's so easy to get around for any assassin. LB can w around and then r'ing on someone. Zed can go through the wall two ways, talon can blink over, I mean if it blocked projectiles then that's one thing, but it doesn't. Maybe take it to 3-4-5 instead of 5-6-7? The stinger indirect nerfs to azir will hurt his laning also, so the last thing he needs is a shitty wall. If you're gonna decrease its duration then just decrease its cooldown too because you're just making it a less safe ability for a squishy mage.