Back in THPS3 me and my friends used to create parks with maximum length and minimum width, then place hellish obstacles throughout so that it became a steeplechase course. That was actually really fun.
It will not work the same way with the physics of skate3, but I think I'll be able to cook something up. Imagine the fun you could have online racing each others courses. The harder course, the more rewarding.

Oh and of course, planning a whole environement around a single line instead of the opposite! Possibilities! I'm so stoked on this