In Burnout 3 on the PS2 there were a few tracks that had a starting point and an ending point within the race, but those two points never connected to each other; it was just a one shot from start to finish. I found that to be an interesting concept. Any chance that sort of thing could be implemented?
You wouldn't have to worry so much about if the track flowed well AND still connected. You might have more freedom that way and develop some pretty crazy designs going for tracks, like big jumps, spirals, maybe some criss-cross sections too!
For the one-shot races reference;
With the more creativity flexibility, you could throw in some difficult racing designs like you'd see from a Hot Wheels track set like this one;
There's all sorts of balancing and functional game physics that go into tracks like this i'm sure, but the more twists, turns, and curve-balls you throw at us during the race the more rewarding it is if we win!