That's a shame. I don't know why, but seeing the track just kills the theming for me, for some reason. A visible track is perfectly fine in Gringotts; it's supposed to be on a track. But being told I'm on Sirius Black's motorcycle or in the Ford Anglia and then watching the vehicle follow along an obvious roller coaster track just makes it impossible for me to suspend disbelief, so to speak. I was hoping for either an indoor coaster or an inverted one. But hey, I guess you can't make everyone happy.