I know fans want more places to stay but Disney doesn't have a need for more accommodations. Every time a new member buys into DVC, the cash resorts lose a guest. By building more DVC resorts, Disney is shifting more and more people from the cash population to the DVC points population.
Essentially, every individual who buys into DVC creates an opening at the cash hotels. And Disney's hotel business / park crowds aren't growing at such a level which would necessitate construction of more hotel rooms.
I'm surprised they even built Art of Animation. However, that appears to be an attempt to go after the family suite market more aggressively.
Disney hotels only average 85% occupancy now--and that's with the recent pattern of discounting, package deals, etc. There simply isn't a need for more Value, Moderate or Deluxe guest rooms.
There are ALMOST ALWAYS discounts and package deals, let's not say it's a "recent pattern." The types of discounts may be different than in years past, like free dining, but like a department store that jacks up the price of a sweater so when they sell it for 25% off you think you're getting a bargain, WDW will always charge a premium for their rooms and make you feel like you got really lucky when you're able to get a "pat for 4 nights, get 7" promotion. The exceptions are when demand exceeds supply, like during holidays.
DVCOwner is right in that DVC is a short-term cash cow that also pays long term dividends because most of the time the DVC members are going to vacation at WDW so that's practically locked-in tickets, meals, souvenirs, and the possibility of those member extending their vacations with room paid in cash.
While I won't immediately dismiss the notion that a new DVC member is in theory a customer who will not be buying cash rooms any time soon, I'd also hasten to point out...there are still a buttload of people in the world, the world population isn't shrinking any time soon, the global tourism market is still there, not everyone in the world will ever buy into DVC, and 85% average occupancy in resorts built on land the company owns, with sweetheart deals that affords them lower property taxes because of the tourism dollars they generate for the area (no matter how much WDW's marketing tactics keeps people onsite)...that ain't shabby.
Furthermore, while a lot of people who stay offsite opt to do so because of cheaper room rates, having more rooms, whimsically designed, with free transportation both to the parks and to/from the airports and those package deals and discounts, might sway more people to opt to stay onsite when they visit the area. Sure, AoA doesn't have a lot of discounts now, but that will change, and when it does, I suspect (as WDW probably does) the rooms will fill and the impact will be felt in surrounding offsite hotels.