I wasn't there, it's not a familiar place to me, I can only imagine to wet the area of the sky, in some places, to make it a little more connected and give a little color variation to the distant mountains. Also, less hard edges for the distant trees and more intense values for the foreground. The horizon line can be even lower, or higher-up, depending on what do you want to emphasize.

No offense, but I also expect such comments when I post on forum. This is for learning from everyone's experience (not that I have to much experience).