Not a program change, but an equipment change. We fly MIA-LAX (business class) a few times each year. AA used to operate this route with three widebody aircraft per day, then it dropped to one, and now even the one isn't on the schedule year 'round. (Discussion HERE.) This has caused us to try JetBlue Mint , FLL-LAX. We still collect AA miles for MIA-LHR flights, but this small change dilutes our loyalty.