I have always focussed forward and I'm completely fine with the teacups, so who knows! I do think people are more aware of the ride mechanics than you might imagine, and also tidbits like the fact it is the only Disney attraction with sick bags amplify the message of it having the potential to cause nausea. Thinking back to when it opened, most of the press coverage was around how intense it was, the sick bags, and then people dying. So this general idea of the ride as super intense has probably settled over it and, personally, I don't think the experience itself is spectacular enough to entice nervous people to give it a shot. It's a real shame considering how much they spent on it!
The restaurant, though, goes some way to fulfilling the potential of a space pavilion to be a fun, immersive environment for all ages. It seems very much in tune with the original spirit of EPCOT, too, and nicely balances the Coral Reef restaurant over the other side of the park. As others have mentioned, though, they really should also build-up the post-ride area to have more activities.