Smaller maps are essentially the key. Points and are:
Is that it is easier to find action.
It looks like there is more going on on the entire map.
Players won't be scattered all over the place and the fights will be more concentrated.
If HQ is down, players will still be able to find the action easier.
The amount of time it takes to fly to bases is shortened.
The war per each map is shorter
With a smaller map, the amount of players on does not matter as much in that fights will be more concentrated and most people on will be fighting out of the same general areas.
With bases closer together, fighters can up from near by fields to defend a base that is being attacked without having to fly 2 sectors to defend it.
The only downside is that HQ is easier to kill, yet that can be fixed.
The only other option, which why I like festers map so much, is that the bases need to be closer. One thing about festers map, is that even though it is big, each field has an objective it can harbor, like how there is a line of tank fields inbetween 2 fighter bases. It doesn't make the fields seem so far apart and bombers and attackers have something to do in the fights as well.
I think islands like a total tank town or furball island defeats the purpose of the war, puts only one style of players in a group somewhere and is pointless to the cencept of the game. When you have 1 group of players all with the same goals and shove them in there own little corner, it takes away from rest of game and attempts to take bases and win the wars.