SAG (screen actors guild) does have a contract with AA which influences many of the service elements on the current LAX-JFK service. What the provisions are for changes, I do not know, but I think AA is quite happy with this arrangement, as is SAG (after all, they are not paying, rather their employers are paying). My guess is that there will not be any changes on the LAX-JFK route for many years (and look what happened to MGM, when they tried to fly planes with beds and couches and in-flight cooking from scratch on this route).