I've been reading this thread since it started and have had mixed thoughts about the new FP+. I think it really boils down to your own personal situation as to whether the new system will be better or worse.
At first, I thought it would be worse for my family. We usually are at RD, tour hard in the AM, go back to the hotel for a nap in the afternoon, and return for dinner or rides/entertainment in the evening. We easily use 3 FP per day and often more. BUT, after much thought, I've come to the conclusion that it would indeed benefit my family on our next trip (March 10-16) should it be in place. And here's why...
For the first time ever, we are visiting so that my DH can attend a conference for 3 days at the CR. That means that yours truly will have all 3 kids (1, 4, and 7) at the parks by myself during the day. No small feat. I will not be able to take the older kids on the big rides until the evening, when my DH is around for someone to stay with the baby. So my plan at the moment is to only go to MK and HS. The kids and I will get there for RD and ride rides that are family friendly and that we can all ride. This pretty much means none of the headliners. We will do things like Peter Pan, ETWB, Winnie the Pooh right away before crowds build. Then we'll ride things that don't have much of a line any time. We'll break for a nap after lunch and then return in the evening with my DH. Now, showing up at 6pm and hoping to ride the mountain rides with the older two will be a challenge. FP may or may not be available and SB will be long.
That's where FP+ can help me. It would be great to be able to book 1 or possibly 2 mountain FP+ for the evening when I KNOW that's the only time we will be able to ride. Add in a Parade FP+ so I don't have to sit on a curb with a squirmy 1 year old for 60+ minutes, and they have just made my day. Since we will only be doing 2 parks over the course of 6 days, we would still be able to FP+ all of the mountain rides over the 6 day span. And I truly wouldn't mind the 2nd or 3rd FP+ being a second tier ride such as Jungle Cruise, Buzz or Haunted Mansion or a parade, etc becasue those are things we can ALL ride in the evening. FP+ would ease my worries of not being able to fit everything in during the evening.
I really hope it's up and running soon and that I can pre-book FP+ before I leave. I'll be following this thread for any and all new info.
Again, I realize our upcoming situation is more unique and even unique to OUR own normal touring style. But for this particular trip, it would be such a benefit.