Just as an aside, I paid for "preferred parking" to several of the resorts last week, and for $45, there is little value. For example, when parking at the Magic Kingdom, we saw the regular parking groups streaming in only a very short distance from where we were parking, walking just a slightly longer distance than we were, and there was almost no value added to the experience. Water bottles? No thanks, I carry my own.
Disney, MUST, be able to demonstrate what the added value is to upcharging for services, or for adding things like overnight resort parking, or people will resist those changes. If you add overnight parking charges, which also do not allow freeloaders to park in my deluxe or moderate resort and take my buses to the parks, ok there's value in that. As it stands, this is just an added cost with no benefit at all.