Thought I’d start a new thread, albeit it might mean the discussion ends up in two places!
DLP have now followed Shanghai’s lead and launched Premier Access and Standby Return.
Premier Access is a paid FP for a single attraction that you buy in the park.
An alternative is the Standby Return. When a line gets busy they start isssuing a return time for later on, for free.
The name “Premier Access” has been mentioned before for WDW. This could be the basis for the new system.