I've said it before and I'll say it again, my solution to solve the CoP is:
Have the Tomorrowland Metro Retro Historical Society "sponsor" the show. New 4-5 minute preshow on bigger TV monitors with better sound quality to help set up the show.
The load theatre becomes both a load and unload theatre (think Philarmagic, Hall of Presidents, etc) guests enter on one side and exit out the other side. Guests would still enter the theater thru the left doors and then exit out thru the rarely used right side doors.
The original 1964 orchestral soundtrack is brought back. The curtains are removed and replaced with a movie screen using digital projection. The screen uses a new CGI animation made to mimic the original kaleidophonic screens (like they did for the D23 Carousel of Projects exhibit a few years ago) the kaleiodphonic graphics transform into a screen with a quick recap about the history of the attraction and how it wound up in Tomorrowland, explaining to guests that they will see the original show, which followed the era of Walt Disney's life (turn of the 20th century thru the 1960s) and then see a glimpse at the future.
Acts 1-3 are restored further to how they were in 1964, minus references to GE.
Act 4 is remade to look either like the 1964 ending (suburban neighborhood backdrop) or 1967 Disneyland ending which featured Progress City/EPCOT in the background.
The current unload theatre is turned into Act 5, a bonus look at the future. It can always be updated from time to time and never effect Acts 1-4. The cast hired to rerecord new updates to act 5 will also do the records for the set in stone script for acts 1-4 for vocal consistency.
PLEASE NOTE: the load and unload stages are shorter than acts 1-4, so act 5 will be a bit more narrow in size and depth, but can still show our carousel family somewhere in the 21st century.