You have to remember that disboard members tend to be power gamers who will run back and forth using 12 FPs in a day. Many of them feel that they are being robbed by only getting three. There are millions of people who don't know the first thing about fastpasses and wouldn't walk back and forth all day if they did. Fp+ is Disney's attempt to get them on-board, but you aren't going to hear from them around here because they don't spend their time online figuring out how to max out their Disney time. As a pretty relaxed traveler, I like fp+, but I go in Jan or Sept so I don't have to deal with lines like the July vacationers do, so there you go.
I would suggest that it is not "power gaming" but people who simply wish to make the most of their vacation time and their hard earned cash.
Living in the UK with a school age child, our only real options to visit are during the main summer vacation (end July to early September), the Easter school vacation fortnight, or the Christmas fortnight. As the last two periods are among the most expensive (and busiest) periods, for us visiting in July/August is the only real option.
As the poster above notes, they can go at quieter periods when queues/crowds are not as much of an issue, but in late July/early August the queues can still be quite long, hence it makes sense for us to have had up to 8 FPs a day under the "old" system which makes us feel as if we have had value for money, and also being able to move to another park on the same day and still be able to obtain FPs.
Thanks to this, we have very rarely had to wait for more than 20 minutes at any of the Disney parks over the six occasions we have visited since 2005, which is one of the reasons we have kept returning.
Unfortunately as a number of posts have indicated, it will be inevitable that those "in the know" about FPs will end up waiting longer and accomplishing less in the parks, and if we do find this happening, it will be adios to WDW for us.
Another issue is that we booked our vacation for next August back in June with the Walt Disney UK Travel Company, and at the time of booking, no mention was made of any changes to the paper based FP system, nor have we received any formal communication from WDW advising us - everything I have heard has been as a result of posts on this forum and other WDW forums, pretty poor communication from Disney.