And Moana does not belong in Epcot's Future world (build a Fiji pavilion and I am good to go - would say Polynesia but that is French and do not think it would mesh with our little rat friend). I mean we can go back and forth.EPCOT's American Adventure fills this role. It's literally its purpose.
Replacing HoP with a Muppets show may be great for a year or two. However, in 10 years when the Muppets show is empty and HoP is a bit less empty who really cares. That is where principals and standards at least give you a leg to stand on.
Now if you can upgrade HoP to include the Muppets and joke/interact with the presidents again I think we can all win.
Sadly, in today's world very few people win with these changes. As the everyday guest who may even like the new Cars ride will pay $30 for it on top of their ticket price then have to fight through 5,000 people on a tight corridor to get to the ride and probably pay for parade access as nobody will physically be able to watch the parade in Frontierland in the future.