So, by that logic, wouldn't you say that much older Disney films such as the Song of the South or Pinocchio are overdone too, in comparison to Pixar.
Honey I Shrunk the Kids has only had two attractions and minimal exposure throughout Walt Disney World, at least in comparison to other films. Now only one attraction remains and that is the Honey I Shrunk the Kids playground.
Pixar, on the other hand, is EVERYWHERE and not just at Walt Disney World. Hong Kong Disneyland just recently opened up one of the first large lands based entirely on one movie, which happens to be Toy Story. DCA just opened up Carsland, another land entirely based on a Pixar movie. DCA also has many Pixar attractions including a Bug's Land. Walt Disney World obviously has several attractions based on Pixar movies. Also, the Art of Animation is almost done and two of the four sections are themed to Pixar movies that are already well represented. Not to mention the fact that Pixar merchandise and advertising is extremely ubiquitous.
I really think that Pixar has become too much of a good thing.