You know, the whole goal of "competitions" are to compete against each other, to see who comes up with the greatest track design. Doesn't necessarily have to be "smooth", or even realistic- the only thing that matters is that you let your imagination run wild and produce a track from it.
Limiting building styles to "what's included with the simulator" isn't very fun at all, at least not to me and numerous others. We like to use whatever we wish to create the track. BTW, NoLimits 2.0 will have a Newton included with it, so you can't prevent us from using it