I don't think WDW will remain a desired destination with the current management.Fewer guests spending more per head can be profitable as long as the parks remain a desired destination - given our fascination with the fad of the day I can envision a scenario where a "Disney vacation is so yesterday!" happens. Coming back from that would be a difficult endeavor.
Most young parents have a limited vacation budget that may prevent them from bringing their kids to WDW. If those kids aren't exposed to WDW, they probably won't have a nostalgic tie to WDW and therefore no reason to visit with their kids.
But Iger and his cronies aren't thinking about the WDW legacy.