After riding the newly refurbished Star Tours 8 times (yes, you read that right), I can honestly say I would LOVE to see SDC build a similar ride themed to Rube Dugan's Diving Bell.
In terms of "eating" people, Star Tours has six simulators that hold 40 people each; there's a reason we were able to do the ride 8 times... The wait was always less than 10 minutes. And the 3D was AMAZING; so crystal clear and the glasses fit perfectly over my prescription glasses.
I can just imagine a Diving Bell simulator ride with similar technology, and I think it'd be a huge hit, especially if they programmed it the way the new Star Tours is programmed, where there are a few different options for the beginning, end, and locations visited, randomized by a computer so that you never know what combination you're going to get when you ride, which increases rideability. That's why we rode Star Tours so many times, 'cause we were trying to get all the possible choices, and even after 8 times, I never did get to go to Naboo.
So... yeah. I think a Diving Bell simulator ride would be amazing.
SDC should also consider looking into a "People Mover" type ride, like Haunted Mansion, Tomorrowland Transit Authority, Spaceship Earth, and the new Little Mermaid. A continuously moving ride with dark ride elements that "eats" people like crazy. It'd be ADA compliant and people of all ages could ride it 'cause it isn't a thrill ride.
The problems SDC has is both in available land space and money. It costs a lot to have a ride as awesome as any ride in Disney; but I'm sure there are ride makers out there who'd jump at the chance to make a Disney-like ride for a smaller amount just to show that they can pull off the same kind of technology as Disney can. Land space-wise, well, SDC is so TINY at the moment when compared to other parks (which just amazes me all the more that they can pack so many rides and so much amazing theming into such a small amount of space), and it is located on such an enormously hilly terrain. I imagine the reason roller coasters have been such a big thing at SDC is because they're the best kind of ride for that kind of terrain. I mean, SDC had to use a parking lot for the Grand Exposition, 'cause where else would they have been able to put something flat like that?