NEWS FLASH! For all who are complaining, and/or just don't like FP+/MB/MDE, they didn't create it for us, the 1-2%ers who go to Disney at least once every 2 years. Disney knows that regardless of what they do, we'll probably come back again and again and again. And, even if we don't, we make up a very small percentage of their guests, so it's not a big deal.
They have created this for the other 90-98% of their guests who only come once every 6-10 years (according to Jim Hill) or once in a lifetime. These are their target guests. These are the ones they're trying to convince to come back more frequently, and spend more money when they do come. These are their loudest, most unhappy guests who complain that they spent "thousands of dollars", "traveled xxx miles/hours", and "stood in line for hours to see some stupid mouse". These guests, who haven't been very often, have an expectation that they will be able to see and do everything and they're kid will have a great time. But, it doesn't work out quite that way, which leads them to spend less, go home angry, complain to their friends and neighbors and not come back for years, if ever. Their friends and neighbors take this to heart as well, and they avoid Disney, or at the least, they have a negative view as well, even before they decide to go.
So, what to do? Create a system where guests can be virtually guaranteed a spot in line for Space Mountain or to see Mickey Mouse with little to no wait whatsoever. By offering such a system, it helps ensure guest satisfaction, which leads to more spending, and perhaps even a return trip in less than 6 years.
Sure, the system creates problems and frustrations for those like us, who have been more times than we can count, and know our way around the parks blind-folded. Because, now, we can't use our "tricks" to get more rides in or take advantage of the fact that others don't know how to avoid the crowds like we do, but Disney doesn't really care about trying to win us, they know they already have us. And, we don't represent the growth market they're after. We're just, crazy, weird, un-happy fan boys who will never be pleased no matter what they do, but still we'll come back.
Personally, I'm not a big fan of the new system either, but I can live with it. The casual way which we've toured the parks in recent years didn't really allow us to take advantage of more than 3 FP any way, so that's not a big deal to us, except when we park hop, but hopefully that will be added in the future. Outside of the advanced reservations I don't see how the MagicBands necessarily make things any different or offer anything that's significantly better than what we had before.