Hi Jamie!
Thanks for your question and Happy New Year!!
Buying extra FastPasses sure would be something I would be interested in doing, too!! But until they put us in charge, we will all have to make due with our allotted three (3) per day.
FastPass+ does guarantee that you will experience your three favorite attractions on any given day. I'm not sure if you know this, but once you have used your allotment of three in a given day, you are free to make additional selections as long as they are available on that day still.
That is why I always recommend that guests book their top three FastPasses as early in their day as possible. Then, they can make additional
FastPass+ selections at either the FastPass+ kiosks in the parks or on their
My Disney Experience app.
I hope this helps and I wish you a Magical trip!!
Chris