Mr. Toad couldn't be saved...it's far more nostalga than Millionaire!
Millionaire was exciting, but is now outdated. MGM is all about show biz, it's where show biz is!, but, unfortunately, Millionaire is now in syndication, and the show took on some new rules and a new host after Regis left.
Star Wars still brings in the crowds, and HiStA with the new scedule is now almost full at each showing.
CoP is still seasonal and could close at any time, with or without warning. At least with Millionaire, they gave you 3 months to see it one last time. We didn't know with Horizions, Wonders of Life, or Timekeeper. At least Millionaire got some warning.
Besides, MGM is limited on space and needs an e-ticket, Millionaire is a C ticket at best, although it has cool lighting, that's about all it has going in it's favor right now. Besides, you can go to Fantasmic! for a cool Lighting Design!