Quite badly? The averages below
- Standby on 5 attractions increased less than 7 minutes each.
- Standby on 2 increased between 9 and 12 minutes. (that's a total of 7 where there was an increase)
- Standby on 4 attractions decreased between 6 and 11 minutes.
Even if you look at their worst statistical increase, 1 ride may be up 14 minutes, with the best decrease being 13 minutes.
Note that some of popular rides, such as Space Mountain, Expedition Everest, and Tower of Terror, times decreased!
One's reaction to these numbers is completely dependent on their touring style. Most "experienced" visitors
never wait in the standby line for attractions like SM, EE or ToT unless they're arriving early in the morning -- instead they use a FP. By the same token, the "experienced" guest would not generally "waste" a FP on things with a more "mid-range" average wait like POTC or HM.
Your point that FP+ has leveled the playing field is well taken and your conclusion (that in the end, overall wait times haven't increased -- only leveled out a bit) is correct. However, that doesn't mean that the WDW-savvy guest doesn't have something to complain about: they are the figurative Peter (the guest who knows how to tour efficiently) who's been robbed to pay Paul (the clueless guest, or the guest who simply didn't care to use FP in the past).
Since headliners are still headliners and reason will still dictate using all of your FP+ for them even if there has been a small decrease in their standby wait times (meaning that for the experienced WDW guest, the decrease in the wait times for headliners becomes moot), and some mid-range attractions are now seeing
doubled or tripled average wait times, the net result for the average experienced visitor is going to be more time standing in line, especially in the Magic Kingdom, than they used to have to do.
I'm not saying that a few more minutes in line is the end of the world or that it's going to ruin anybody's day, let alone their vacation, but I do think that those who say "but I'm paying more than ever and I'm not going to be able to do as much as I used to!" have good cause to feel that they've lost out.