This report really does reinforce many of the FP+ critics worries.
1) that essentially FP+ will become the new standby, and that essentially unless you are willing to wait in massive lines, you will be pre-booking your 3 attractions, and that's pretty much it. Though, people will say "Hey, there is RD"
2) RD will become less valuable. Your experience with headliners have 75 min waits (posted at 25) by 9am, is exactly what many of us worried about. We have been told over and over again, that "This will never happen" "people won't show up for 9am FPs" ... well, apparently it happened, and if its happened once, I imagine its going to happen again. It makes sense that this happens, one of the major premises of this system is after all to disburse the crowds, to maximize efficiency of the attractions, meaning that they will be used to their maximum all day, not just in the afternoon.
So sure, you can still do RD and run to the rides and get a couple in quick (though its hilarious when people say "I hated having to run for FPs" but who say you can still rush around to get in headliners at RD). But from your report, it would seem you can get LESS done, even at RD, much less done on busy days.
I wonder how much more this will become apparent, while its always been true that RD could have been used to maximize your trip, it wasn't as necessary, if it continues to be more necessary, more people might just clue in, and RD might become much less valuable.