So many families I know that are regular (at least once a year) visitors have been making the choice to stay off-property. Economically it just makes so much more sense - you can rent a house for up to 8 people, within 5 miles of the resort, have your own private pool, jacuzzi, and a whole house to live in - for under $150/night. Sure, you have to deal with a rental car, but I honestly find that I get where I am going more quickly by car than the "hurry up and wait" Disney bus system these days.
I'm honestly surprised if they see demand to build yet another new resort anywhere outside of teh Value range.