My family has always park hopped. We go to one park at open, stay until around lunch, go back to the resort to relax, swim, etc. , and then go to another park for the evening. Before fastpass+, we'd only get a few fastpasses on a typical day. If we were at Studios, we'd ride TSMM and then get a fastpass for later. We were never the type of guests who ran around collecting fastpasses all morning for later in the day. Because my parents never wanted to pull my sisters out of school, we'd always visit during peak seasons. We'd get to a park in the morning and do as much as we could before heading back to the resort but when we'd go to another in the evening it was always way too crowded to be able to do anything but just walk around. Now that both my sisters are school teachers and have to follow that schedule, they still have to come down during peak season. However, with the new system, they book fastpasses in the evenings so when they go later in the day they're actually able to do something. When my dad and sister were down here over Christmas week last year, they had fastpasses for some of the mountains, soarin', TSMM, etc. for various evenings throughout their trip. They'd get to the park at 4-5:00 when it was crazy crowded and still be able to see some attractions, something they NEVER would have been able to do with the legacy fastpasses. Now I understand that not everyone out there thinks like my family, but for us, this new system has worked out great and I don't see how it discourages park hopping, especially now that you can use fastpasses for one park in the morning, and then if you choose to go to another park in the evening, if all your fastpasses for the day are used, you can book another one. To me, it's beginning to feel more like the old system. Nobody is forcing you to book your fastpasses 60 days in advance. If you want to wait until day of to decide which park to go to and book fastpasses from there, there's nothing stopping you.
Unless you want to meet Anna and Elsa and not wait 5 hours. Then yeah...you might want to book 60 days in advance.