IPS is something that has been Disney theme parks since the beginning. Walt knew how to use them properly, but Walt also did Original rides also. The problem lays under Bob Iger. The complaining with IPS is due to Bob Iger and people basically do IP Rides in WDW even if the rides don't fit the theme of the land.
Disney is supposed to be a theme park and that means the ride is supposed to fit the theme of that section of that park or the theme of the park itself. Take a look at Epcot. You can say rat the movie does take place in France, but you can not say that for Frozen. There is claims that Norway influenced Frozen, but its a stretch.
Nemo makes sense for the seas. Guradians of the Galaxy doesn't appear to at this point unless there is something educational about the ride that fits the Future World section of Epcot. The Future World section of Epcot addresses real topics such as space, cars, and seas. Imagination has a pavilion because creations were designed due to a persons imagination.
The problem with Guardians of the Galaxy is you are dealing with a fictional world and showed a fictional energy stone. The nature of Guardians of the Galaxy fits in Tomorrowland or DHS.
The other complain with IPS with people comes from is if a Non IP gets replaced by an IP ride.
