A much faster way of reuniting passengers with checked baggage would help - I have in the past waited longer than the duration of the flight for the cases to arrive on the conveyor, also if there is an incident, some sort of assurance that the hand luggage would be offloaded promptly and returned to passengers would help, in a similar vein. The thought that the plane may be impounded for days or weeks, along with all the hand luggage whilst investigations are carried out is no doubt a source of anguish to many passengers