
I like the idea of specific time for map "rotation". After the number of fields have been taken the map would have to "reset" but could stay the same map until it's "scheduled" retirement.
* Very important: The map rotation should occur at a time during the day that players would not log off and retire for the day. Thus, I would recommend a time closer to noon CST.
I feel that it is just as important for players to know they are against a time constraint to conquer their objective. Randomly booting players at a time when there has been a build up of game play enthusiasm could end up being worse than the effects of split arenas on numbers. The same problem would occur if the numbers were low and game play was very slow (like it may be in early morning EST and Euro time zones), resulting in players logging off or worse, not bothering to log on after being conditioned to expect interruptions of the sort.
Although the original post was over the concern of maps being reset too soon, I have another concern over maps that run too long (in my opinon). An example of a map that has worn out its welcome, could be a very large map that has a very difficult possibility in being "conquered". There are very good maps that just linger on a bit too long. Especially, if a particular map is not very conducive for ground battles or quick furball action in early morning play times (where I log a lot of time with my buds).