I kind of agree about MF:SR and all of the others except for Mission: Space. I don't really understand the hate for M:S because I think it's a great attraction. Although I'm inclined to think it would probably play better at Disneyland than at Epcot. SoCal audiences I think are a little more into thrill rides, so I sort of wish they would move the attraction out West so we in CA could enjoy it. I think it would be a huge hit and bring some badly needed excitement back to our Tomorrowland.
Regarding MF:SR, it's a decent attraction but I agree it fell way below the hype. This is a personal preference and I realize I don't necessarily speak for the masses, but I really prefer to experience an attraction as a passive participant as opposed to having a "job" I have to do during the ride. That may be a big reason why I'm not a huge fan. For the same reason, I would say the biggest disappointment by far is Web Slingers at CA Adventure. Especially when you compare it to what Universal did with the same character at IOA. I was really expecting that Disney would be motivated to build something that would just blow that one away, so that was kind of a disappointment. Actually, all of Avengers Campus is kind of a disappointment.