Remember, the goal isn't ride everything as many times as possible (for most people, anyway). The goal is optimal use of fastpasses and standby in order to maximize enjoyment of the parks.
If you haven't ridden an E-Ticket early the in the day, and the FastPass times are in the future, the question will always be, "Do I grab the FP+ (and what do I do while I wait) or do I ride something else".
This is where the
MDE app (or a third-party wait times app) in conjunction with the kiosk becomes a powerful tool. If you know that standby times for something you want to ride are short, you can grab a FP for something a bit later, effectively multitasking the time. Or maybe that's a good chance to grab a meal, see a show, or even just get off your feet and out of the sun.
For anyone who wants to be a Ride Commando, rope drop is now and always will be essential to the strategy. FP then basically helps smooth out waits during the busy periods so you're not killing an hour or more in line. All of the recent posts from people have proven that out.
For just about everyone else, FP is really a way to avoid standing in a slow moving line for the majority of the day, giving you the opportunity to do just about anything else instead. That's going to be very valuable to most guests, and yes, it may mean that you don't get to ride Space Mountain three times in one day, but you'll get to experience just as much of the park, certainly. I think it's safe to say that anyone really could do just about any E-Ticket at least once, plus quite a few of the other rides. But the big bonus is that they'll know for certain that they have three activities they have priority access to. You simply couldn't guarantee anyone that before.
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I think the biggest thing for ride commandos that is being overlooked is that legacy FastPass was really luck of the draw. You didn't know what your return time was going to be until you got to the ride to find out. While you could leverage a touring plan and FP pretty well, there was a LOT of slack time in those systems.
When you can schedule three FP in advance, you can effectively eliminate slack time for a large portion of the day, taking a lot of variability out of them. I expect as people like Josh at EasyWDW, TouringPlans, and RideMax start learning these systems better, you'll find that their offerings become even more optimal, because you've effectively eliminated a significant portion of the algorithmic guesswork that was necessary. TouringPlans already allows you to put your pre-scheduled FP in customized touring plans, but their suggestions for what to FP before you've booked could be better. But once you have stuff scheduled, it is really great at figuring out how to move you around the park.
What they haven't done is factored the 4+ passes in yet (nor the location of the kiosks), and when that happens, it's going to be pretty amazing to see what kind of value can be squeezed from FP+.