As much as I would have loved another redux of Sea Base Alpha, redoing it wasn't going to get people back in there. It was a very 80's techno cool sort of thing. You probably don't remember, but there was a terrible show with Wil Wheaton and Roy Scheider around the same time.
I don't think the sea base would resonate with people today. It's just doesn't have enough "wow" factor now. Strange how perceptions can change in a short span of 15 to 20 years, isn't it? That's what was great about Horizons and TLC, they were plausible, but still just enough sci-fi to make you think this is as close to this as we'll get. I don't think we'd feel the same way today. Do you?
Yes, I'll agree that Nemo was a short, easy way out. But when you've invested that much money into an aquarium, and no one is coming in to see it, sometimes
you have to take some measures that blur the rules that were instituted. TLC was hardly the beginning of this. Innoventions, then WoL, then Test Track, bad Imagination, and Soarin' all led FW into a new direction. They've just made pavilions to get people into them. EPCOT was very stale for awhile, and USF and IOA were major players in people staying away. Disney thought thrills would bring them back. And they did, so they must have done something right.
I'm not happy with FW now, but it's far better than it was in the late nineties. And I at lease see some direction towards getting back more toward edutainment. If that means a Pixar character makes a few appearances, so be it.