As Frost said:
Neutrals should be something special! Like Switzerland Event Hitler didnt attack them. Maybe something like:
few ports
very hard to attack (support from every nation battle ships in reach)
Good for making big profite, trade or capture
able to get into every Port
rich on stocks of every Product, even exotic or rar stuff
The one character per account is not clear if you start the game. You should make a notice popup on creation. And you should show the ingame map with the start pos.
At the beginning I have choosen an easy nation (US) but at the end I would prefere something Harder. So I am forced to delete and create a new Char and level up again. If its just one char per Account It would be nice to to have the possibility to change Nationality once or every 30 Days or so, or pay 3€...