I really enjoy the layout and colors - it has a weird medieval feel to it, overall. However, I have to say I don't believe using many different brushes for your elements was the way to go. Your map lacks cohesion, the styles do not always mesh well. The hills, for example, are a stark contrast to everything else. The farmlands seem to be top-down, while everything else is isometric, and I think I'd personally not use so fuzzy a brush for the dirt roads - to me, at least, it bleeds into the green, but my eyes aren't so good
While using brushes from different artists is great, you want to be sure the styles go well together.
For the water, perhaps you could try the wood cut technique (like your original map of Cad Goleor), or the lines coming away from/surrounding the continent? Then with some sort of texture overlap. I think it might suit the style, of course it's always hard to tell until you sit down and fiddle with it. I'm excited to see it develop
It's a very interesting little territory with sort of a quaint feel.