I agree with Redrobes & Ravells - Blur/fade the aqua outline of the coasts a bit. It's not as bad in the 2nd image as the first. I also think the shadow/bevel on the rivers in the 2nd image is a bit dark and thick - again that's an opinion don't feel you must change it. Ultimately you have to be happy with your work.

Cities, farmland, etc. are difficult (at best) at this scale, I think you've a fine job so far with what you have and don't really have any specific advise/ideas for you.

Keep up the good work