Agree with Allerion, the big labels are hard to read and ihmo doesnt fit with the town names. I liked your political borders, but it looks a bit shine/ strong dunno how to tell right, it it a bit smooth i guess it will be better.

A dont know right about your rivers collors, all the time that i zoomed it i saw roads >.< maybe coz the color, no named rivers and you not using roads in you map.
Nice choice in the brushes and your coasts shape is really amazing! And nice work with your islands... i always have problens with it