I've played it and it's great! The driveline with many winding turns is interesting and I'm sure it will make for a popular online track.
Upload it to addons as it is and you can keep working on it and uploading updates later, if you want.
I think it's definitely worth having in addons as it is.
IMHO You *might* consider adding things like
-alternate routes
-a jump where you fly through space for a moment
-an occasional hole in the wall or floor so that you can fly out of the track into space to make a turn even more dangerous
-sections that twist upside down or loop and twist around different axes
-a wider section or a narrower section to break the monotony
But maybe you don't want any of this on purpose and it's fine with me.