I think that those of you who are of the opinion that folks who defend Disney of the past are just old fogies and need to get with the times misunderstand why the majority of us feel the way we do. It has very little to do with individual attractions and more to do with the effort and creativity that went into attractions in the past that, in many cases, is absent from a lot (not all) of modern attractions.
Of course not all of the attractions from the "glory days" of DL or WDW were instant classics that should have never been improved or removed. Disneyland was in an almost constant state of flux while Walt was alive. You don't hear too many people pining for the return of the Conestoga Wagons or mule rides. The Flying Saucers in DL were terrible, by all accounts.
All I want is for modern Disney to create attractions with the idea of saying, "There may be a similar ride mechanism elsewhere, but we're Disney and we're going to do something with it to make the experience unlike anything else." Make experiences that are worth spending thousands of dollars and travelling from other parts of the world to enjoy.
Am I upset that the original mission of Epcot is being abandoned in the name of adding more thrill rides and incongruous IP? Absolutely. I'm well aware that time travel hasn't been invented yet and so it isn't possible for those of you who weren't able to visit EPCOT Center in it's heyday to have a frame of reference, but it's not fair to dismiss the opinions of those of us who were able to experience it simply because you enjoy today's WDW. I'm glad you enjoy it. I've never had a bad time at Disney. All I can do is offer my informed opinion comparing today's parks with yesterday's. After my upcoming trip, I will have visited WDW once in each decade of its operation (twice in the 80's). There were several years between each visit, so the changes stood out to me. Many were for the better, some detracted from what had come before.
I can't speak for everyone, but all I want is for Disney to always strive to be the best that it can be, because I've seen what is possible when they're firing on all cylinders and it's marvelous. Right now, I don't think they are. It doesn't mean that they won't ever again.