I've been on this route/plane many times. I don't mind seeing it go, so as long as the 772 is utilized in other ways, as in maybe a new route (dfw-syd) or something new int'l. It's such a short flight. IIRC this plane goes onto LHR after arriving at ORD. Now, if they are just flying it to ORD and parking it for many hrs before LHR, then I would say keep it on that DFW-ORD route.