The one comment I'd add is that it could have been rotated slightly clockwise to eliminate a bit of the empty space in the top left and bottom right corners, since they contrast quite a lot with the lush detail in the rest of the map, and tend to draw my eye to them. Not sure whether that would have really been possible though, considering that it would have made the perspective slightly off (mountains in particular).

Anyway, beautiful map and love the style, more of the same please!