Suprisingly good for CC3 (haven't used CC myself though)!!
Only one thing I don't like about the map: most of the rivers are not very realistic (placed "wrong").
Please dont take the map literally. Its not based on the real world, its just for a fantasy game, in a fantasy universe that takes place in the imagination.
I had honestly thought of putting a floating river on this map that goes uphill, maybe next time.
P.S. All the rivers in my maps are carbonated.
I really like the layout. Very nice. That northeastern island is screaming - "Plunder Me!"