My main criticism is that it is basically a rectangle. If you were to triple the size of the canvas so it was surrounded by "ocean" it would look roughly rectangular and not very natural. (Westeros suffers from this too, but then it does fit on two pages of a regular softback book). It happens because I think many people have a subconscious need to "fill" the canvas/all the available space on the page.
I think it would benefit hugely from a more overall natural looking shape.