I'll confess that I haven't read all 43 pages here, but from what little I have read, I understand the complaints of the system being slow, etc., but there's a few more negatives w/ the new FP+ that I don't see how Disney will (or can) fix:
1. I noticed several folks having to borrow a pen to try to write down the time of their FP+. This happened more than just once and added a significant wait time to the general population at large. The folks looking for a pen to write down their FP+ time knew about using MDE to find the FP+ time, but voiced their opinion about wanting it on paper because they thought it "was easier" to have it written down as opposed to having to use their phone.
2. An advantage the legacy FP will always have is being able to give a FP to someone else. If there's a way to "donate" or give a FP to someone else using FP+, please do enlighten me, but what could be easier than simply handing someone a small paper stub (legacy FP).
One more idea I had - I know this will most likely never happen, but:
1.
Space Mountain Single Rider Queue - I've seen train after train after train leave with 1 seat open. If only they had an actual single-rider queue (like on Everest)... but yea "SM isn't 'laid out' like that
)
2. On all popular attractions (like TSMM) - They shouldn't have to "merge" FP/FP+ with Standby. This is the reason for the 2nd helping of wait times.
The standby line should have it's own dedicated ride vehicle area such that it never has to wait for FP/FP+ to merge (take a trip and imagine how much faster this would be). Family of 5 in FP+ wasting time to find their MagicBand and then scan it into the machine and you're in Standby... no problem, no wait, just keep moving since you've (Standby) got your own dedicated vehicle/ride area that doesn't depend on the volume or activities of FP+!
This would speed up Standby significantly. But then again... "It's not 'laid out' to accommodate that. Excuses, excuses...