I'd love to see this changed as well. When starting the first flight of a trip, I want to get my fuel and food, then the pax and the bags while I get the flight deck ready. I can live with it for turns as well, if deboarding was just baggage.
So in the World According to Tim:
Boarding:
Jetway Docking
Flight and Cabin Crew on Board
Fuel and Catering
Pax and Bags On
Jetway Undocks
Deboarding:
Jetway Docking
Pax and Bags Off
Flight and Cabin Crew Off
Jetway Undocks
NEW OPTION "QuickTurn:
Jetway Docking
Pax and Bags Off
Fuel and Catering
Pax and Bags On
Jetway Undocks