Sadly I have to agree with you except on all but one point.
As the locos carry on their march these traditional charters have all but disappeared
Traditional charters are undoubtedly on the decline but at well over 5 million ppa, still represents over 30% of Manchester's total passenger numbers. The question is, will the Loco's continue to expand at the same or higher rate than the decline in charter passengers given the increased competition from other airports.