Hm... good fixes
Let me continue
Your coal looks ugly in places
Well, in all places. Let me guess: You have made your map with Krom's map editor, right? It kinda reminds me the old KaM maps with such style of coalfields
For example, how it looks in a place:
And how it should be (but can be different, ofc):
See the difference?
You can make much smoother coal fields with tiles, not brushes, it'll take more time, but the output is definately better.
Tbh I'm not a skilled mapmaker, there are people who can make nicer ones than me.
Also, you don't use the "Magic water" tool, thus way your water flows in all directions. You can find it in Krom's editor (I don't know exactly where), or in the Remake's editor, on the "Tiles" tab under the "Terrain editing" menu. You need to click on the water with it and it will flow straight in 1 direction.
Btw, good amount of starting resources