Nice!
Took a quick spin in it, the map is looking good, you got the morning lighting down cold... You learn well grasshoppa!
The main criticism I'd give at this point is your polycounts at some spots. But given the sheer openness of the map, it's going to be very hard to keep that from happening. Maybe edit the terrain to add another large peak or something, to reduce the size of the wide-open spaces, or maybe hide more of the structures you have behind hills & stuff, since that's what's causing the 400+ polys I'm seeing in the more panoramic views.
Another thing I'd do is scale up the terrain texture by another factor of 2. It would still look ok up close I think, and would reduce alot of the repetitive tiling pattern you see now.
As for what more to add at this point, I think more of those cool terrain "peaks" you have on that mountain would be nice. Maybe do a lower-poly version of them & add a bunch around the map, especially to hide the more high-poly structures you have. Give them the same morning sun spotlight effects, and the map will rock even more than it does now...