Bu99er the food! How many crew-members and shifts would you need?????
You just get a route specific FRMS and work around that. I imagine it would still be 4 pilots and the usual cabin crew complement. The rest period before, during and after the flight will be different. I suppose they can hook up the crew to some of the new monitoring gear and see how much sleep they get going across a large number of timezones and work a FRMS around that.