I actually quite like that blue/orange transition. I agree with vorro about the outer glow though; why didn't you put it around the northern bits?

I like the direction you're going with this; I think my only real issue is that the coasts seem... too plain? I don't know if I can explain what I mean correctly. On Jared Blando's recent Hyranden map, for example, he has a darker, thicker spattering effect along every coastline that helps balance all the mountains and stuff in the interior. While I like your mountains a lot, the coasts seem too pale and empty and open. Of course maybe you're planning to add all sorts of things in there, in which case I'll shut up now.