The one thing about this that still irks me, however, is a loss in spontenaety, especially with park hopping.
Our experience was that it was still possible to park hop by making FP+ selections for late in the day or evening at the second park and then riding all attractions at the first park Standby.
DAK is a particularly good park to start at. Its headliners (EE and KS) are high capacity attractions while FP+ does not add any appreciable advantage to the shows (FN and FotLK). Dinosaur and Primeval Whirl were longer waits but it was still possible to tour a lot of DAK without FP+ by being there for rope drop and knocking off EE and KS early.
In general though, FP+ reduces spontaneity. With above average crowd levels, it can be extremely difficult to change FP+ selections on short notice.
What FP+ does do is open up Epcot's Future World and DHS as "second parks" for park hoppers. If you book far enough in advance, you'll be able to get a FP+ selection for TSM or Soarin', something that was not possible with FP, where you had to be there for rope drop in order to get a decent FP return time.
However, capacity is extremely limited on these attractions. Most guests will
not be able to get one of these late afternoon or evening FP+ selections. Offsite guests in particular might be shut out.
Furthermore, the current tiered system in place at Epcot and DHS make FP+ pretty useless except for 1 or 2 attractions. These parks really do need additional popular attractions.
FP+ changes the way we tour the theme parks. Looking at the big picture, it seems to me some will benefit from FP+ while others will suffer as a result.
As a whole, FP+ is a net-zero.
It's truly unfortunate that corporate Disney invested all that money in a new ride reservation system that benefits some of its paying customers and hurts others.