Here is my take on FP+:
Let me start by saying that our next trip in Dec. is a split trip. We are already more Uni driven due to onsite perks than we are Disney. We are waiting to see how the coin toss turns out for Disney in the next 2 years with this FP+ thing and park changes. I know Uni isn't for everyone, but we love it and with the express pass you feel like a VIP for every ride and the resorts are luxury for AFFORDABLE prices. Can't beat it, it really spoils you. Very cutting edge rides as well compared to Disney. Also, everything is right there at your fingertips and very convenient.
Second, my family rides ALL the adult rides at Disney (too old for kiddie rides). And we like to ride more than once. Sure, we soak up everything else too but if there were not rides we probably wouldn't go. Others specifically go to see parades, shows, meet and greet characters, etc. We do some of that but mainly we plan around rides. It may depend on your children's ages, etc.(?) as to what floats your boat but
one size does not fit all.
This all being said, we would NOT be happy restricted to only 3 FP per day. We are rope drop people and we use the original FP system to the max with some planning. Just because 3 will be good for some, don't assume it is good for all. If Disney DOES change the rules to only 3 per guest per day - well there will be no more
Disney vacations for us as we won't drive 12 hrs to visit and then stand in line for an hour to ride one ride. This trip is over $1K more than our trip last year due to increased costs overall and this is with 1 less person in my party. It's a lot of money to stand in line. So, if this happens either due to the FP change or just crowd increase we'll just go elsewhere for our vacations. But we know this will be
our choice, with several factors involved.
However, if Disney gives this new perk to onsite guests only (and DVC/AP holders) and keeps a system in place for time spaced additional FP throughout the day - in addition to the 3 for resort guests - well that would be wonderful. We will keep planning to come and
stay onsite, we may even get to the park an hour after rope drop and spend money on breakfast at one of their restaurants.
If 3 FP is all you get in the future no matter what - well that has taken away a current perk and not improved it at all. Does anyone really think that is what Disney is doing here?

They really need to make an announcement and put everyone's fears to rest once and for all.
I am really looking forward to using FP+ this trip. I am thrilled that they are going to do more for their resort guest. I think we will love it since we plan which park ahead of time anyway. If we can't get more than 3 FP on the first park day - I'll be visiting guest services. I don't plan to cheat the system (give me a break) but I better be able to pull as many as any ticket holder in the park during this test phase.