I would have to say that this map is pretty good in that you have a lot of land battles that take place around Europe. Germany has no way of getting down to Africa until later in the game. I like the fact that the sea units take hits on the units being carried by transports instead of the whole transport being wiped off the map altogether.
That written, I think the air unit "fighter should not be allowed to go on transports but instead be able to fly over territories and land on them by themselves. I also think that the transports should be able to be fired upon by fighters if unescorted by the ships other than the submarine.
I'd add Calvary units to this game and if you want to add the zeppelin "bomber" then you would need to have scramble of fighters over capitols to be able to have a chance to shoot them down. I don't see a need to add air fields for capitol cities, it should just be a given that the capitol cities have air fields to counter attack the bombers or zeppelins in this scenario.
Italy should be a neutral country on this scenario until later on in the game like it was in real life, they were indecisive with who to join. The game should reflect this.
I love the two hit tanks. I love the amount of ground units and I love the way the fighters fight first to decide air superiority. I think that the lesser countries should be the way they are in this game, less income and less units to produce.
In my opinion I think this game is a great start to a really great game. It could be made a lot better with some tweaks. Maybe it is only because I played on line and not the real board game. The USA is not such a huge force in this game and I think that makes it more balanced.