if they just updated the last scene every so often to reflect the near or far future i feel the attraction would be fine.
No it wouldn't.
And that's the problem with CoP.
The attraction "Walt built" made sense in the 1960's. It showed progress of home appliances in the course of a single lifetime. A 70-year-old sitting the original show would likely recall each of the 4 eras (1900s, 20's, 40's, and 60's).
If they were to simply keep updating the final scene, the jump between the 1940's and today would be larger than the 60 year span covered by the entire original attraction.
To fix CoP would require completely gutting and rewriting the show. Maybe 1900's, 40's, 80's, and today. Or even 50's, 70's, 90's, and today (which would be the same jumps as Walt's original)
But by the time you've done that, you've really gutted Walt's touch on it. So then what's the point of saving it?
If an imagineer were to say "let's do a brand new animatronic show showcasing the last 60 years of kitchen appliance history!" it would be met with a collective yawn from both park management and probably most guests.
It's not 1960s anymore. There are no longer Worlds Fairs with big corporations willing to pony up the cash to develop exhibits that will only be seen by a small fraction of an Internet Age audience. And if not for GE's request to make an "advertisement", I doubt Walt would have dreamed up CoP and built it for his theme park audience, either.
That means CoP is a museum piece. And I'm not sure the MK is still the best place for it. Ship the sets and AA's out to the Disney Family Museum and be done with it.
For those who say its killing Walt's legacy, every aspect of MK and DL's design is a living tribute to Walt's legacy. Not to mention movies, characters, and songs. Face it, the dude has a living legacy.
The only significance of CoP in FL is that its the only attraction Walt personally worked on. If you swap out some of WDW's 1971 IASW dolls with the Worlds Fair original dolls, you are in the exact same position. If you want to see more of Walt's personal touch than that, go to DL.
And please stop with the crazy "move it to Epcot". Why would ANYONE spend money to move and rebuild attraction that is not worthy in its current location? Moving CBJ or Tiki Room to Animal Kingdom would not make those any more beloved or popular. Moving CoP wouldn't, either. It's a fanboi pipe dream with no basis in common sense.