Well, I'm going to WDW next weekend. As of this moment, thanks to FP+, I know I'm going to be riding Thunder Mtn, Splash Mtn, and Space Mtn in the middle of the day on a Saturday without waiting in any stand-by queues. I would LOVE to be able to do the same thing when going to Disneyland since Saturdays are about the only days I can go. Sadly there are far too many terrible entitled AP's who'd abuse the crap out of the system if a similar option was made available.
That said, if there was a paid option that would make it easier to reserve a FP+ time for rides like Frozen and Mine Train, I'd be all for it. Those were all taken by the time I had secured my WDW admission.