That is a very good map!
I like the style, colorful but with moderation. Very clever and stylish use of fonts and text effects.
But I agree with you on the forests, they are not up to the same good standard as the rest. I suggest that you use the same basic symbol work a bit on it and make the forest "float a bit by using shadow or some kind of glow effect.
Overall a very good map to present and sell a world overviev.