I may be in the minority, but I think the changes to the fast pass system could be positive. I think this new system is potentially their way of limiting and enforcing better control of the fast pass system. It could improve wait times for everyone.
With the old system, it was a free for all with first come/first serve distribution with few limits. I see a lot of people voicing how unfair the new system will be, but the older system was still unfair in many ways. Some people would get multiple passes for the same attraction while others never got a pass for that attraction (the early bird gets the worm?

). On several of our trips, we observed times when fast pass lines were almost as long as stand-by lines and they were anything but "fast". Fast pass return times were routinely ignored and people just came back anytime after their return time (guilty myself :raises hand: so I'm not picking on anyone, it was just the way it was

). The new magic bands and fast pass+ system may make it easier for them to enforce the fast pass window which should help the standby lines move more efficiently and make the fast pass lines themselves move faster. They are limiting people to 1 fast pass per attraction which seems to me to be their way of trying to ensure at least some fairness.
I have no problem with them offering early fastpass+ booking and additional passes to those staying on property. People pay a huge premium to stay on property, and the benefits for paying extra aren't exactly awesome and have been dwindling. While a premium hotel room runs about $250/night off property, one can easily pay about $500/night for a deluxe resort. Convenience is one thing (I happily paid for it when my boys were younger), but is it worth double? A perk like extra fastpasses could easily make it worth the extra money for some families to stay on property. I don't think I'll ever understand the argument that it's not fair for them to offer perks like this to their onsite guests or to charge an equivalent amount to off site guests for those perks. I see these as perfect perks and incentives to entice people to stay on property.
The one thing that I do think that needs to be amended is the one park restriction for fast passes. It severely diminishes the value of adding the park hopper option if you don't have the ability to get passes at more than one park. You can keep the tiers and number of passes per tier, but they should allow multiple parks. Something else they should perhaps consider allowing would be the option of treating the fast pass tiers like dining tiers - you can use 2 of a lower tier to get 1 from the premium tier or vice versa.