Had a friend tell me about two imagineers speaking at USC bragging how they targeted Horizons to replace it with "their idea", openly mocked it, said that the "choose your own ending" was a case in bad story-telling and they lobbied, skewed facts, and happily got it closed down and the plot opened for expansion. That's how I learned that "seasonal" meant "ride it while you still can!"
I could go on about how this sucks, but I understand Horizons lost its sponsor, EPCOT needed a thrill ride, blah, blah, blah. But M:SPACE proves to me, and the imagineers mentioned above, that WDI didn' get EPCOT, still doesn't, and showed a complete lack of respect for EPCOT, its heritage, its fans (but they respect DL fans and heritage) and a lack of creativity to take Horizons to the next level, which could have been incredible (imagine 3D with those IMAX screens). With all the cool ideas they had for a space pavilion, they chose a glorified spinner? Sorry, a centrifuge is literally a spinner!
You wanted a thrill ride for EPCOT? Make one without ripping out FW's heart.