Good tip on breaking up the ruins even more.
Many of the things you suggested I'd done but obviously, I need to increase the effect. Grateful for the input though.
The shadows on the mountains I have had a hard time with. I think it's conducive to my chosen color scheme. Would it be advisable to lighten up some of the high points to show more relief instead of adding shadows? That lowest elevation color is pretty dark and the shadows I've added aren't really coming through.