Hey there, sorry to jump into your thread late. I think it's looking good. Just a couple of things;

1-I wish your forests had just a bit of volume, not quite sure how I would achieve that though, as I haven't tried this scale yet. On a smaller scale a cast shadow works great to elevate a given object, maybe you could try a black outline on the forests... not sure, someone else may have a better suggestion.

2-I'm assuming your brown terrain is rocky, desert, or infertile for some reason, but what that reason is (or what the terrain is) is unclear. From the climate and scale my impression is they are too expansive, unless you have a reason for wanting them that way.

Those are my thoughts, do with them as will or ignore them, , still a good looking map.