I like the map as it is.
The pros of this map, is people need to keep their CV alive all through the fight, which needs some more thiking than the usual NDisles type of "park CV 5 miles off" mentality.
In NDisles, you don't have to care what happens to your CV.
All you need is park CV off 5 miles, turn enemy base into a parking lot with brutal display of power - once you can do that, you don't have to care about what happens to your CV, since goons can just get off from another nearby base 25 miles away. and come capture it. People can get up from a nearby base in their favorite plane, and cherry pick the battle field at will.
Whereas in Bigisles, it's literally big. The gaps between fields are large, and the only base which is placed in that gap, is your mobile CV - which needs to be defended, taken care of, and kept alive.
You may capture the base by the usual steam-roller method, but if people don't keep a lookout for the CVs and keep a constant state of alert, the CV will go down, and people are going to have to wait a loooooong time until the CV respawns, and continue its former course.
Bigisles has plenty of furballs. It also has good strat quality.
I've seen some optimistic combination of both strat-based play and furball-based play in this map. Furballers can get an all-you-can-eat hot fights if the forces between the CV and nearby enemy base is well matched. Strat-players can be content in keeping a minimum safe distance between CV and enemy base. Flying CAP flights will ensure the CV's survival, making the strat-players happy, and since the fights will last as long as the CV is alive, the furball-players are also happy.
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But in all due fairness, some of the "vacant" areas consisting of 2~3 VHs in a 50x50 mile area do cause stagnant fronts for little too long.
Also, Bigisles is a nightmare for lone-wolfing pilots and non-CV plane types. Especially for those who choose the fights for a good round of cherry picking, opportunities for a 'good fight' according to their standards, are slim. You're not going to get an opportunity to up one plane, hover near enemy base, club baby seals and get kills in this map.
In Bigisles, it's "where there's a CV, there's a fight". Which also means "no CV nearby = no fight to enjoy"... which comes down to "you don't feel like defending the CV = then you don't get to fight", since the CV is going down, one way or another, without proper defense.
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Maybe changing a few VH bases to airfields might help, but I don't think anyone who can't feel any fun in current Bigisles layout, is gonna feel any more fun because some bases are changed to airfields.
I feel the same way about Pizza map. I hate Pizza. Changing country layouts are gonna help, but I'll probably still hate it anyway. Guess we'll just have to weather what we don't like.