That doesn't look too bad. Kind of excited to try that.
Have you thought about any sort of setpieces you might like for the area?
Setpiece as in like, some focal prop of the area. Not all have them, but if you're doing a spytech mining theme, you could get away with a giant drill or something. Was just curious, sounds like a great idea.
A word to the wise: If you made the clip brushes yourself, they're going to be invalid solids unless you split the top face diagonally by selecting the opposing corners in vertex-edit mode and hitting Ctrl+F. Which opposing corners, I don't know. One way makes it just slightly concave, and the other makes it just slightly convex; you want the latter, but I don't know how you'd check without trial and error.
arena_unusual:
Fear my lightmaps