Thank you, clsteve, for summarizing what many of us have been saying for eons. Staffing is a very real challenge to any ongoing WDW expansion. Also profitability is an issue as more destinations does not directly result in proportionately higher guest spending.
Despite what people may think about crowd levels, the current parks aren't close to maxing out their capacity. And if numbers continue to grow, careful expansion of the current parks is far less costly than an entirely new gate.
If there is to ever be a "5th gate", I still maintain it will be more of a "boutique" park like Sea World's Discovery Cove. It will be something which is relatively inexpensive to build, requires few cast members to maintain, yet offers such "unique experiences" that they can command very high daily prices.
As for WDW vs. Universal, Disney's own profitability is far more important than any measures of market share. Looking at attendance, WDW has continued to climb while USF is also making gains at its parks. Disney's comparative share of the market may be lower, but it's an expanding market. They won't change their approach to the parks until there is an obvious (and lasting) impact on the bottom line.
Universal is the recipient of a lot of good will (or at least favorable comparisons to WDW) due to the amount they are investing in their parks. Frequent WDW guests make comments along the lines of "I'm making my first ever trip to Universal because at least they're building new stuff."
Objectively, I would still propose that the Disney parks are (collectively) superior to Universal. What's different is that--to someone who has never been to Universal--it's all "new to you." To someone who has made 10 or 20 visits to WDW and zero visits to Universal, obviously many new experiences await them at USF. Even with a $500M investment like Pandora, the 2-3 attractions, restaurant and shops they may build won't compare to 40-50 new rides and shows awaiting at Universal.
But, make a handful of visits to USF--such that very little is "new" anymore--and see how the two compare.
Universal is seeing very good returns on their current investments but eventually that ROI curve will begin to flatten just as it has for Disney.
Living in a middle-to-upper-middle class community in the Midwest, a trip to Walt Disney World is considered a rite of passage for young children. Most families visit at least once--some catch the bug and visit much more often than that. Disney will always have that advantage. That's not to say that they can completely rest on their laurels...but it does help keep the parks in more of a maintenance / profitability state rather than an expansion state.
Um... so I'm the only one stuck on what TDO means?
Yeah, "TDO" stands for Team Disney Orlando...a term Disney uses internally to refer to management of the Florida parks. About 2-3 years ago, the "cool kids" in Disney discussion circles adopted it, seemingly to sound more like insiders.