Ok, I tried out the changes I was thinking about, and came up with this:
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The coast lines turned out better now I think, and I prefer this kind of forests. I put less definition on the sand dunes as well. The rivers disappeared a little among the trees at first, so I drew them with thicker lines, and I don't really like how that turned out. Should be easy to avoid by just keeping more distance between forests and rivers though.

Actually, I'm not entirely sure about why I'm posting this Not much to discuss I suppose. This is what I'm up to, anyway. I think I'll start a full map in this style soon