if you are able to attack naval superiority and take it over from one of the european powers, you should also be able to fortify back from naval superiority. i played this map for the first time and that lack of being able to reinforce back just gave the game to another team.

How about having time lapse button to show how the map and players have moved their armies during the course of the current game. It is also useful for the end of the game to see different strategies develop over the course of the game.