I second that, this show, or some semblance of it, should be offered all the time and not be preempted for a movie preview that we may or may not remember in a year. And, yes for me this is a must do if it is running.
With that said, I think it should be moved to Main Street USA, second spot would be at the entrance to EPCOT. IMHO those two are where it would best fit. Over in DHS, just make it the story of the Disney Studios and their accomplishments. But then again, I want a history of Walt Disney World museum also! One can dream!