traffic is being handled optimally from an environmental point of view
Funny you should mention this NewModel, as here in Canada, one of the latest mantras has been leaving aircraft on STARs for managed FMS approaches to every extent possible. There has even been one company (those working here will know who I am talking about) that have submitted for approval their own arrivals, all in an effort to obtain the most efficient use of their aircraft. All fine and dandy if they are the only aircraft in the sky, however in the middle of a sequence, it ain't gonna happen.