While I agree with everything about the Disney bashing, your Everest and Mission: Space defense examples only really help his point. Mission: Space has a beautiful facade but inside a very ho-hum, claustrophobic, borderline unpleasant simulator experience with already-dated graphics... it feels more like an exercise than something *fun,* and it isn't even inspiring like its predecessor. In short, as an "E-Ticket" attraction, it's a major disappointment.
Expedition Everest too has an absolutely gorgeous facade, with excellent place-making and a perfectly executed queue... and then, again, a bare bones, uninteresting, anti-climactic ride experience. Notice the pattern? Same deal with Mermaid - Disney can create these wonderful introductory elements to their attractions but can't seem to follow through anymore. I went on Everest even when the Yeti worked, and while it's a beautiful animatronic and a chilling effect, it doesn't excuse the whole lot of *nothing* going on around the rest of the ride. The whole "you're supposed to only glimpse the Yeti" piece is BS, IMO. There's a billion ways they could've made that ride more visually interesting and engaging, but they cheaped out after the facade.
I've said this before, I'll say it again - Disney hasn't built a truly mindblowing, A+ executed attraction since Tower of Terror.