T3 air is so oppressive in the game. 1v1's its basically the opposite however if you get to T3 it can still get oppressive even in a 1v1. T3 Air always ins with 2 giant blobs of Air just staring at eachother.
The single point of T3 Air being so Oppressive (not OP) that it basically eliminates ground pushes late game especially if you are down in air because the enemy can cheese it so well with bombers, gunships, mercy spam (it happened before lol), etc. It's just not fun with how Air is balanced
Of course this is my opinion and experience.
T3 Air also eliminates any interesting plays late game because you locked on ground because for one T3 Omni exist (needs to be NERFED HARD IMHO but thats another topic). You can't sneak anywhere on the map because the Enemy Air will just see you instantly. Maybe we should nerf ASF Speed? No, in my opinion thats like a middle nerf. You aint actually solving the problem. You are hindering it but not fixing it. ASF should have more buildtime and T3 HQ Upgrade & Supports should cost more, the Power Adj should be nerfed too.
T3 Sams IMO is an easy fix, just revert like maybe half or third of the AoE.