I'll give you few feedback regarding aesthetics.
1. The riverside is too barren. Maybe you'll need to place some doodads. Even if you want your amazing doodads to show clearly, you could still use small doodads to decorate.
2. You will need to be a little more brave in using terraining textures. Using 1x1 brush is good, but you're being TOO SHY.
3. You got broken ramps. They're not actually broken, but looks quite weird and unnatural. You can use height to make them look natural.
4. Terrain is mostly flat.
Good thing creeps no longer get in the way of scouting