This is purely anecdotal, but here it goes...
I stay in Deluxe resorts frequently—usually club level. The majority of affluent guests I speak to already feel Disney is too stressful. They usually depend on concierge to book their restaurants because a 180-day window is ridiculous to anyone who isn't a Disney nut. I have had long conversations with wealthy guests who hate the fact that their entire $15k+ vacation depends on sticking to predetermined eating times, ruining their flexibility and plans to relax. Combined with the crowds, many of them wish they had just gone to an island resort or Europe. Of course, some people also assume the monorail will take them everywhere and they turn their noses up at the buses.
Anyway, my point is that I can see how Disney could spin this internally to favor technological changes: "Surveys show our highest spending guests are frustrated with the existing infrastructure, so we'll make things easier by giving them an itinerary with everything on it, plus throwing in some FastPass perks!" Yet in my experience, the schedules are exactly what frustrate guests; they're already stressed enough in real life, and they hate having to follow yet another schedule to "enjoy" their vacations.
Plus, let's be honest: most
truly wealthy guests typically stay off property at the Ritz or Waldorf-Astoria and visit WDW once every few years. The majority of Deluxe resort visitors are upper-middle-class people with massive discounts. A tiered FP system would be an artificial caste in the parks. Those people (myself included) already enjoy nicer resorts, better transportation, and more amenities. There's no reason to add FP perks to Deluxe resorts.