I have a KevinYee-like dislike for FastPass, for pretty much all the reasons he's stated in his columns. However, I do like the Uni approach to FP that allows people a guarantee to "see it all" if they stay in one of the Uni hotels. I've been thinking about how to adopt that to WDW given the huge number of hotel rooms it has.
Here's my answer:
If you stay one night... You get nothing.
If you stay two nights... You get a collection of FP Return Line tickets for either Magic Kingdom or Epcot (your choice.)
If you stay four nights... You get the entry tickets for rides at the park you didn't select at the two night mark.
If you stay five nights... Your choice of the Studios or DAK.
If you stay six nights... Whichever park you didn't choose for five nights.
This scheme has all kinds of benefits. It upsells people to not stay an odd number of nights unless they're staying at least five. I suspect the majority of us choose between three or four night stays if we're not doing the full six night week, and in this setup you'd be tempted to push it out just one more.
Also, this would be the strongest shot yet fired by Disney against the hotels on I-Drive and elsewhere.
Because you have to stay quite a while to get the See It All stuff for DAK and Studios, it might cause these parks numbers to go down slightly. The fact that some people won't stay five or six nights and will be discouraged from going there until they've used up all their passes elsewhere should lighten the load on these parks (especially when you consider that a large number of people already do stay six nights and will gum up lines enough as it is.)
Finally, for the visitor there is a bit of an assurance that unless they slack off big-time, they will definitely have a chance to "see it all" at which ever park(s) they go to. You are guaranteed at least one go-round at every major ride at whereever you go. The rest of the time might be spent on re-rides, smaller rides, or relaxing or maybe even some of the non-park resort facilities that have languished in recent decades.