^ tl;dr nerf Janus.
Jokes aside, the whole T2 air is only for snipes sounds a lot like the people who don't like full share. People tunnel vision on the acu like nothing else exists. T2 air is very strong and underused. I almost completely stopped using T2 air for snipes once I got better than the 1200-1500 range or something like that unless someone is clearly asking to have their acu die to t2 air easily. I regularly use t2 air to snipe eco though.
I think delaying t3 air doesn't really solve much. It makes t2 even stronger and just delays the issue - people will rush t3 air regardless if the map calls for that. T2 drops are already kinda op given T2 transports are slightly faster than inties and having asf a few minutes later makes them that much more oppressive, right now I feel that they're balanced out a bit by only having a relatively narrow timeframe where there are no asf to counter them.
I've won air and seen it won more often with mass inties or inties + swifties/janus vs t3 air more often than I've won with t1 land vs t3 land. Yes air has an impact faster than land, but that's only to an extent. A relatively quick t3 land drop can be brutal for example.