Slightly off topic although I would like it to be an improvement for 2020!
Having experimented with one of these a few days ago for the first time with someone it isn't that that Is that issue! The problem is the staff not utilising it properly.
At one ride (inferno) the person wrote the actual queue time down for us not to reuse it again in that time.
On nine seperate rides (some the same) the staff member just looked at the card and waved us through telling us not to worry about having it filled in.
On the rest they just wrote about 20 mins or half the actual advertised queue time down.
If it was utilised properly there wouldn't be masses of people in the lines for RAP as they'd have to wait in the park somewhere or join actual main queue for rides with smaller queues.
There were several occasions where up to 8 people were trying to get on rides with one RAP holder. This they were a bit stricter with when I saw but wouldn't have been all rides I'm sure!
When people were confronted at Inferno for being there too early as they had another 20 mins left on the sheet, the staff member suffered abuse as he was doing it properly. The member of public wasnt happy as no one else had stopped him.
Hopefully going forward into 2020 staff become stricter or utilise a better system