Has it been discussed in this thread yet how Fastpass+ has increased standby wait times almost across the board? Despite what Disney's PR statements say ("we've seen a 2% reduction at major attractions!" or whatever), Fastpass+ and advanced booking ensures that the popular attractions will always have a steady flow of Fastpass+ users, regardless of the crowd level for that day.
Attractions like Rock 'n' Roller Coaster and Toy Story Mania may not have seen much of an increase, or maybe even a slight decrease, because they were already seeing a constant full demand of returning Fastpass holders. The biggest affected are the attractions that used to be a secondary Fastpass choice. For example, Tower of Terror usually averaged only a 20-30 minute wait, so most people would opt to obtain a Rock 'n' Roller Coaster or Toy Story Mania paper Fastpass and wait in the ToT standby line. While Toy Story Mania and Rock 'n' Roller Coaster would distribute all of their paper Fastpasses early on, Tower of Terror and other "secondary Fastpass" attractions would still be distributing their paper Fastpasses well into the evening, because either it wasn't needed, or they were already blocked out from obtaining one due to having a higher priority one already. With advanced booking, those same guests now have a Rock n Roller Coaster Fastpass and a Tower of Terror Fastpass (again, regardless of how crowded the park actually is), so the same guests that would previously just wait in a quick ToT standby line are now using Fastpass instead, artificially inflating the standby line to the full 80% Fastpass/20% standby minimum merge ratio at all times.
Also I want to state that in the "we're testing!" phases of Fastpass+ I was defending it on here, but now, a year later, seeing the full extent... I take it all back. A year later and the system still has constant issues - and I'm not just referring to this thread but from my own experience, word of mouth, and accounts from CM's - it's constant errors and confusion. And now it's become quite clear just how much this was calculated to keep a steady demand at all attractions, and the end result for the guest is that you have to do even more work to ride the same amount of attractions as before.