I have a suggestion that would certinaly enhance the experience via announcements that can be used for specific types of airlines.
LCC - Announcmeents that would lead to inflight sales of food, drinks and onboard shops e.g Ryanair, easyJet, Thomson Airways
Regional - which would offer drinks and snack services e.g Royal Air Maroc
Full service - Which woffer complimentary meals usually economy choice of 2 alongside business class options
Semi service - such as Finnair that would have full business class features but for economy class sales of drinks and food