I think as you have a blank canvas there you should try this.
Lay the astro flat.
Then build a few jumps and try them in different areas around the track, try different track layout's with these temporary jumps in different areas of the various tracks.
Then you will have a better idea on where to build more permanent features.
I am sure with such a nice surface going down, TORCH will put some very good features in. Like many have said, build it and they will come
