Would Kefalonia be acceptable as an Aegean Island? Probably not as it's an Ionian Island.
But, it's Italy vs Germany 

http://www.youtube.com/watch?v=QxF1n5A3KWo
People shouldnt release these kind of maps like, many people would die.
Its too much awesomness in one place, Germans and Italians, FIGHTING EACH OTHER?!
Shit man.
hmhh..
Map really looks interesting! I love the setting, Italians vs. Germans! wohoo! Brilliant idea!
Also map looks great!
However there is ONE BIG BIG thing i really hate (yes hate - sorry for the harshness)!
Please - for the love of god - when you map an island dont minituarize it!
Kefalonia is the 2nd largest Ionian island, 30*40 km large and with 40k inhabitants. Now on this map it is scaled down to 1*2 (? guessing) km, it looks like small sandhole!
This is a (imho) very very bad "habit" from FH1/BF42 (see wake, iwo jima, guadalancal (!!)) etc.
So please the next time you make an island map (which in general is a cool idea) just make a PART of the island! (eg. as Sfakia on crete)
Other than that (as mentioned above) nice ambiance and interesting setting!