This is such a wrong headed and non-Disney way of looking at the parks.
Disney used to lead the way and gave their guests things they didn't know they wanted. The real classics of Disney are things like Haunted Mansion, Pirates, Space Mountain, etc. Things that were created for the parks to be unique experiences. No one knew that was what they wanted, but it was what they wanted. Now everything (in true Hollywood fashion) has to be test marketed and show RoI in some way rather than the intangible "magic" that Disney pioneered. Every thing is focus grouped and has a cost analysis. This is how Disney will eventually kill their golden goose. They'll take away anything special and make it generic and dull.