Although I'm not '74 and don't have the full knowledge of this like he does, I can answer this question. It's a combination of both factors. Some of the current execs are retiring no matter what, but many of them are frustrated that their long-term plan of sitting on pixie dust and watching stupid tourists show up anyway has failed. It was inevitable: Universal has been adding substantial attractions while Disney simply raised prices. Tourists are smarter than they were ten years ago, and with online research many are choosing to cut a few days out of their WDW visits for a trip to Universal or Sea World. Guest survey responses are getting lower, with many of them claiming WWOHP as their favorite attraction. Theme park attendance has grown at every Disney park worldwide except Florida and Hong Kong. Plus, even though Universal will never reach the attendance levels of WDW, Uni is pulling in percentage gains while WDW dropped. Those numbers cannot be denied. Considering that WWOHP was just the beginning of Uni's Orlando expansion plan, WDW finally conceded that the FLE won't combat Potter or Transformers. FLE is a beautiful bandaid to fix the MK's current crowding issues and doesn't add much true capacity other than dining.
Remember, we're discussing people in those TDO offices; the successful turnarounds at Uni and DCA have damaged TDO's pride. Nothing is currently greenlit to help Florida any time soon. Avatar is a long-term pipe dream at DAK; and the FLE, while lovely, merely addresses existing concerns. NexGen has already raised significant issues in its testing phases. Meanwhile, Uni has WWOHP, a Potter expansion, Transformers, and multiple updates on the way—and DCA has Carsland and significant performance gains.
Good thing Florida has that enormous plastic hat in DHA to add MAGIC. Uni has the most cutting-edge ride in America.
Remember all those hints I dropped about Staggs' visit and the closed-door meeting at DAK? Corporate and TDO have finally gotten serious about improving WDW.