Re Q2 I believe that the question of whether meals on board are paid for, or not, is the tip of an iceberg. The boards might have to expand a bit!
Q3 Your Q about when the pax will reach the arrivals hall is followed by reasons for flight delay. I would also want reason for baggage delay (happened to me twice recently).
Q5 may be a cultural thing. I've noticed that US airports tend to order by city (then by time) whilst most other places seem to work by time. I wonder if I prefer time because I'm British?