Kanth,
Ultimately you repeat microcosms dictated by the rules of base placement in the MA. Laying out a full arena design sucks, then everyone plays armchair general after you break your back second guessing you. Creating it by committee won't work because ultimately only one person builds it, you cannot farm our bits and pieces. And the committee is like asking 4 blind men to feel up an elephant and tell you what they think it is while you sculpt a statue of it by their directives.
You rely on the game itself to be why people are really here, and that given the toys they paid for, will play air force and panzer commander in the sandbox. Buzzsaw is in it's own strange universe that doesn't resonate with the majority who are looking to play WW2 air war, so it's out of balance to make the general broadest group happy. All the change in ndisles did was make it so the current small numbers could find each other with the least amount of effort.
19 miles 3\4 sector is the separation rule for minimum distances with airfeilds. Those three are about 12 miles. Half the time 2 or all 3 of those fields are in the hands of a single country due to that small distance. I applied 19 miles to bowlma as much as I could, without over loading the players with an eye full of bases everywhere. Ndisles is very good on not overloading your visual perception of the map. Waffle only traded field types in tank town to shorten the flight distance to a furball. Some nights people want to take bases, some nights people feel lazy and don't want to fly or drive anywhere. I applied that to bowlma on a larger scale with repeated microcosms.
I'm not sure Hitech will allow 12 miles as a standard other than telling someone to do it as a one off, the primary airfields on that central island are over a sector apart and balance the game play. Until some bored geniuses during off peak time take advantage of the down sides to bases too close together and take away everyone's fun by capturing all of them.