I'm really liking this. I agree with SG that the forest font could use some "clarifying." Also the river labels are a bit illegible.

Some of your rivers are disappearing into closed lakes near the shoreline. Typically, I go in with a moderately large and weak prescale displacement brush(that should approximate the FT term, I'm not on windows right now) to lower the land between those brushes and the sea till an inlet appears. Another thing I often do in Wilbur(at a much earlier stage of terrain development than you are at) is to lower the sea level by about 2000 feet or so ,run Mr. Slayton's handy-dandy fill-basin and incise-flow method, then raise the sea level back up. That last often works wonders for all but the most stubborn of deep basins.

Did I mention I'm really liking this?