I was under the belief that excessive field captures would pork the arena, having a map reset, with no new map appearing for play (?).
As far as squads coming in and populating the AvA. All good. I dont think the arena would degrade to just another Early war arena. I think just the fact that everyone is flying country specific airplanes is a step above the main. I think the type of folks who would gravitate towards a more full, but still "different" experience, would be glad for and work towards creating all the right, fun approaches to play. Of course,...alas, I am an optimist.