I want the Guardians in a Guardians ride. Mission: Breakout provides that. Cosmic Rewind doesn't. The cast is featured on small screens (even when there's a big screen in the room!), the aesthetic is not reminiscent of the Guardians at all, and the plot and villain has no emotional resonance with the characters or the franchise. This last point is particularly egregious, because Disney went to great lengths to establish that, for Peter Quill, EPCOT is closely connected to memories of his Mother. Quill's relationship to his Mother is, of course, the emotional core of both Guardians movies - its the entire reason for all the pop songs on the soundtrack, and why that soundtrack MATTERS. Yet having somewhat ham-handedly linked EPCOT to the central emotional arc of the franchise, Cosmic Rewind uses it for nothing other then a clumsy joke that MOCKS emotional connections to EPCOT! It's one of a long list of story elements the ride sets up at some length that ultimately have no effect on the ride experience, a list that includes time travel, a giant space deity, and the Guardians themselves! You could literally remove the time travel conceit entirely and it would make absolutely no impact on the ride.
What Disney is supposed to bring to rides is story, atmosphere, and theming. GotG succeeds DESPITE, not BECAUSE of, the story, atmosphere, and theming. That fact is compounded by the amount apparently spent on that story, atmosphere, and theming.