And I've said this several times before, under this system I would be HAPPIEST if they would use FP+ like dining credits. You could keep the round number of 3 per day, but it wouldn't feel as restrictive. If I am staying for 5 nights on site, give me 15 FP+ "credits" to use in whatever manner I choose, over those 5 days, with no restrictions. If I want to use 15 on day one and screw myself for the rest of my trip, so be it. If I want to wait and use all 15 on my last day, so be it. Just give me back my choice in the matter.
I have no idea how this would work with AP holders, I haven't thought that far ahead, LOL.