Without reading the whole thread, there are only two important things in an emergency.
1. the passenger has to find/know his muster station
2. he must know how to properly wear the life jacket.
Both can be easily checked without having to be at the muster station for a long time.
Watch the video,go with your life jacket on to your muster station,maybe answer one or two questions from the crew(about the content of the safety video) and thats it.