My problem with Disney trying to do thrill rides is that it's a constant arms race. Disney could build a high thrill attraction today that would attract the thrill seekers, but in two years someone else would have build something even more thrilling. Six Flags and other amusements parks are building new thrill rides, especially coasters, every two years or so to keep up. With the level of themeing we expect from a Disney attraction, there is no way they would ever spend the money to constantly build newer thrill rides.
Gawd, I hate that everything Disney does has to be to "one up" the competition. Absolutely no disrespect to you danlb, I know that's TDI's way of thinking as well.
It's great if they want to come up with some multi-hundred million dollar extraordinary cutting-edge attraction every few years - but not everything needs to be that way. At this point, the parks (except for MK and especially DHS) are so starving for new offerings, it'd be nice if we could get quantity over quality (and less money doesn't necessarily lower quality either).
I'd much rather see them spend $100 mil on a new ToonTown at DHS and 2 or 3 dark rides the quality of Pan or Pooh than one single supposedly cutting-edge $100 mil attraction like TLM.