You're not thinking about this from a mathematical standpoint. You can make the argument that a first time guest wants instant access to lower demand attractions. That's all well and good and I'm sure that in many cases it is true. However, with the attractions on the list I provided earlier in this thread there is not a significant time savings to merit a Fastpass+ reservation. It's not a matter of meeting a guest's needs, it's a matter of deceiving that guest into thinking this is an actual benefit.
I get the benefits of planning ahead. I definitely think 2 months is beyond ridiculous, but I see the value in having the marquee attraction reserved in advance. So they should do just that. That's where the value is. They've even identified that with the tiers. The real valuable Fastpass+ reservations are on those Tier 1 attractions in DHS and Epcot. We all know the attractions that we used to run to to get that Fastpass. What I have suggested is to keep the spirit of Fastpass+ in place with 1 advanced booking. Doing so would eliminate the ridiculous premise that some of these other attractions ever get waits above 15 minutes if they don't have Fastpass+ inflating their wait times.
Then, day of your advanced booking and an additional booking can be used similarly to the way the old system worked (you can get a new Fastpass when you use one). The alternative here with the current plan for a revolving Fastpass (after the first 3 are used) is an improvement but it's not the best solution.
I can make an argument that this is something other than deception, but I'm not going to argue against my own argument. If someone else wants to present a legitimate reason for them to do this besides, "you don't know what the first time guest wants" I'd be interested to hear it.
While I addressed many of your points in the content above, I'll rephrase to specifically address some of your points here. There is 15 years of data about how the parks operated with Fastpass, and I was certainly an avid user of it. I long suggested a set up very similar to what I suggested above and think scheduling things same day is a good alternative to the previous norm of no true end time. All of these components of Fastpass+ are positive. But the advanced booking of 3 different attractions is unnecessary when in many cases demand is really only needed for 1 or 2 at the most. To reiterate the point made above, the "need" for Fastpass at many attractions has been verified by
@lentesta. While wait times haven't increased significantly, what is difficult to argue is the need for Fastpass+ at a show. In most cases, you are going to lose time using Fastpass+ for a show. You will show up between 5 and 20 minutes early as it says on the ticket when you could see the show in the standby line if you show up 4 minutes before the show begins. In the other rides listed, the savings is typically less than 15 minutes. That certainly has value to some, but the masses would be better served if that lower demand attraction was standby only.
As for your suggestion about making another FP+ after using the first. That would be preferred to me as well, and it was one of the options on the survey that went around. I agree that it is a better alternative to the one that Tom Staggs intimated in his blog post.
As for the tiers, they further emphasize my point that the MK is really the only park that can truly accommodate this. The tiers are necessary because the attraction lineups at DHS and Epcot are top heavy. The issue isn't as big a deal at the Animal Kingdom because the higher demand attractions have such a high capacity, but beyond the top 4 attractions Fastpass isn't needed elsewhere in that park either.