I still have the cassette tape of the original Aladdin soundtrack, complete with offending lyric. Bet I could get all of maybe $5 for it on eBay...
As far as Disney mistakes, hm...
not putting "A Guy Like You" much earlier in 'Hunchback of Notre Dame' (it's light and humorous, belonging in the first act when everything is being set up, not late in the third act when the climax of the story is going on and Paris is literally burning)
Making a live action version of "Beauty and the Beast" (Dan Stevens was great, and Josh Gad was pretty good, but Emma Watson was miscast as Belle and most of the other casting/script choices fell flat (Gaston more misunderstood than evil, an unneeded backstory involving the Beast's cold, possibly abusive father that goes nowhere, the transformation scene changed from Dan Stevens emerging from a pile of rose petals which would have been AWESOME.)
In fact, just about all of the remakes have been bad. Come on, Disney, there are lots of great fairy tales/original stories that haven't been done yet. Take a chance on those! I'll even give you one. My favorite childhood book, "The King With Six Friends."
http://www.kathleendeady.com/TheKingWithSixFriendsPage.htm
It's got just about everything. A young, handsome protagonist. Great supporting characters WHO SHAPE SHIFT! An interesting, offbeat story. True, the lone female character is weak, but that can be remedied. I think it would be a GREAT Disney movie!!