NOt sure, your rivers don't look as much pixellated as coastlines. About the map and cartouches I'd try to have same space between them. The bottom cartoucge looks sticked to the map which is odd. Also be careful when using overlay on labels, that makes some colors variations that doesn't look very good. You may want to use solid color instead to make more legible. And I keep thinking that the text on the bottom cartouche need more space around it inside the cartouche to let it breath a bit. Well that's just my two cents