I've been playing the mod for 2 weeks now and I'd have to side with the "fix Aero/VTOL" camp. The lag shield is real problem and provides the sky jocks ridiculous amount of advantage. It's not really about balance or what not, because it's fundamentally broken when the planes are warping everywhere while I'm perfectly visible to them. I've already written off SA_Extreme (quit when server switch to it), because every decent players whores out their aero/vtol, the canyon geography makes any ground unit a caged mouse.
I understand that it's "Combined Arms" game, but honestly, if the only solution is to play on a limited player server with top notch ping, what's the point? The idea with combined arms is so that the game support large enough player base so that any players can adequately play ANY roles without feeling left out. Right now, it's either play on a 10-12 player server for decent chance against Aero or get pestered by aero in any 20+ player servers. Again, it's not a ping problem, I've been playing on servers with 50-75 ping. This is definitely a server-engine issue. Whether the devs can fix it or not, I don't know. I hope they can, because I like the idea of having aero in a mech game, but not in this unbalanced way.
More immediate fix is probably this. Get the AMS and ACM system up and running. Right now, missile systems are over-powered and aero is the perfect platform to abuse it. Another is to allow direct-fire weapons to shoot down missiles. Missiles are about the size of BA in the game-models, so why not let those weapons be able to hit the missles? It's frustrating right now to see missiles coming down and you can't do JACK against it. Let me fire my Mgun against it so I can at least swat down few of them, you know like Phalanx system. These won't affect the balance, but at least gives the mech/tank a chance to survive. And if we really want a dedicated AA platform. I'd prefer 3xUAC2 with a LTgauss on a Huit C. I need more range with direct fire capability.
I really would love to see this mod mature and build up a great player base. I don't know when that supposed re-boot Mechwarrior game is come out, if ever, so this has been a godsend since the last true Mechwarrior game.