Easycor,
This is just conversation, but I have a similar impression about having separate ground and air war arenas. The most fantasy full idea would be connected by base capture, basically the fantasy would be the ability to "spawn" into an entirely different "ground or air challenge" arena from the current arena.
Bustr is simply saying that when there were more trees, it was very much a ground war utopia. No one wants the ground war to "ground" any potential pilots due to the cost in their video resources. The air war should always take top consideration, and a separate arena concept may allow the best of both to co exist on the servers.