You really need to work on your maps, there is just so many improvements its overwhelming =/.
Ill just give you a hint, all maps should be properly lighted, not fullbright. It really turns the appeal to the map down.
You dont leave open sky like that, looks very unrealistic. Try adding a cliff or buildings?
Displacements can make a map look a whole lot better.
Better use of textures, try and detail it a bit more.
These are just some... improvements, PM me if you want to know more.
Just add some more detail to the map! Thats the main problem with this and it lacks alot of essientials that I have listed above.