I have mixed feelings about it.
It is not bad, but unbalanced. The southern country is in the worst position by far. No hi alt fields, all premises lined up.
What I would certainly change is the three moutain ridges and replace them with water space. So three bigh islands. And make an extensive use of mountains, allowing only scarce flat surfaces. That would mean more cannon fighting (fun for GV's and airplanes alike) and having to look for the right spot to ditch.
Cheers,
Pepe.