I think Hull-Leeds really is one of those 'suppressed demand' services-with only an hourly service, usually a 2-car 170, people don't use it.
I'd hope to see something along these lines after wiring (fingers crossed)
Western TPE-Leeds-Hull: 2tph calling Selby & Hull only
Leeds-Hull: 2tph calling Cross Gates, Garforth, South Milford, Selby, Howden, Gilberdyke, Ferriby, Hessle, Hull
Leeds-Selby: 2tph calling East End Park*, Killingbeck*, Cross Gates, Thorpe Park*, Garforth, East Garforth, Micklefield, South Milford, Thorpe Willoughby*, Selby
As for the western end of the North TPE, I'd ideally like to see 2tph Leeds-Manchester Airport via the Ordsall Chord, 2tph Leeds-Liverpool Lime St, and then an hourly service each to Shrewsbury (via the Ordsall Chord, Stockport & Crewe) and to Holyhead (via Earlestown, Warrington BQ and Runcorn).