The American Adventure was so well done, it's almost impossible to just get rid of it or change it significantly. So much money was spent (I believe something like $65m) that Disney is taking its typical stance....run it into the ground. You can see the show has largely gone unchanged since it was created over 30 years ago. (NOT that I have a problem with that...it's a great show, my favorite on property.)
I never want The American Adventure gone, but I'd also like to see it maintained with dignity. I fear that like most of the attractions that were built by the geniuses before Iger, they will be ridden into the ground and not properly updated/maintained.
To tie it back to Maelstrom, I feel like the people who are OK with Frozen are justifiable in their opinion because not a lot was done to enhance, maintain, and keep the old Maelstrom relevant.