I think that the defense of IPs is silly. What are some of Disney's most classical rides? Original rides based solely off the Imagination of Disney Imagineers, and nothing else. I understand that some great Disney rides are based off of IPs (i.e. Tower of Terror, Star Tours, Indiana Jones) but how long will those stay? Movies don't stick around forever. The fans will come and go, the popularity will surge and fade. I get that movies like Frozen and Guardians of the Galaxy are popular, but for how long? Instead of having the mindset that Disney needs to build rides that will bring in guests, Disney needs to build rides that will be great because of what it is. Not what it's based off of. Disney is already popular. People are going to come for anything.
The best Disney is when they can make something that resonates.