That border is absolutely fantastic. And for what it's worth, I like the folds as they are.

The only thing I'm a little iffy on now is that road (?), the light blue line running from Oongala to Asweyr. It looks off somehow. I don't know if it's because it contrasts too much with the terrain, or if it looks too smooth, as in not going around impassable natural features, or what.