ISTM that many posters in this thread, and in the other related threads, have lost sight of how we got here in the first place. No doubt that the current timetable has proved to be unworkable but that is due to failings in the "active" parts of the industry. I have seen no suggestion that the timetable itself is unfeasible though it has proven to be (over)ambitious. So the blame for the chaos lies not with the timetable planners but with those who are supposed to deliver it, and that means the TOCs, especially Northern and TPE, and also Network Rail and the train manufacturers, primarily CAF, for failing to deliver their outputs.
So while it is unfortunately necessary to make some reductions in the service offered these should only be needed for a relatively short period, a year perhaps. In the meantime the manufacturers need to get the new trains into reliable service and the TOCs need to get a proper grip of their staffing issues. Given the problems with completing all the training required that will mean continuing to increase the numbers of traincrew on the payroll with the DfT being told to keep their noses out at least until service delivery has been stabilised. And in the meantime stock and crew diagrams need to be made more robust to prevent small delays from snowballing.
In short there should be no need for some of the drastic cuts in connectivity that some have suggested, indeed I think most of them are completely unacceptable. And all stakeholders need to keep the pressure on the Dft to get on with the other projects so necessary to improve the network across the north, not just P15/16 but also TRU, Hope Valley capacity and Leeds eastern approaches to mention perhaps the most pressing. Oh and the Class 769 needs to either be made to work in short order or binned.