Let me throw in a wrench here.
Problem with large maps and small player base is vicious cycle - you come in, there is 15 people per side, but you fly around for 30 minutes and can't find a fight. Everyone is flying by their lonesome somewhere off the in the world. You log off. Player count stays low. This is especially apparent during EURO timezomes.
My proposal:
1. leave large maps.
2. have a script running that disables bases further away from the center so that number of open basis (and capturable ones) is proportional to number of people online.
Issues to be solved:
- strategic targets and ability to defend them ( or lack of thereof since bases there could be disabled). Maybe always leave one "non-capturable" base open for interceptors? At least on maps where those strategic targets are somewhat centralized.
- win condition. Dynamic scaling could trigger a win without captures/action. Maybe win condition would scale with size. Three scales available, in small - win condition is 90% of own and 50% of others, in medium 90% of own and 35% of others, and so on...
Either way, we need to find a way to make a small population server fun again, cause now, if there is less then 50 people online, i personally log off, and I suspect others do too.