Man, you're fast indeed! Looking fantastic. And i agree on the subtle coloring, very nice! If you're looking for tips on labeling, Eduard Imhof's "Positioning Names on Maps" is THE reference in my view. It looks as if you're already doing it the "right" way (ofc placing names is clearly more a question of good readability and aesthetics rather than "realism" with placing rivers, so it's hard for me to say it's right or wrong)!