Further to the points I raised above...
Which vehicles would operate the service?
As you're reducing the frequency of the X1, you've got free B9s.
As you're reducing the frequency of the 2A/2C, you've got free Citaros.
As you're (presumably) cutting the X3/X36, you've got a mixture of free Northern vehicles which add up to the PVR (including 36/36A).
There's no guarantee that the service would immediately justify B9s/Citaros, but then passengers on the Chester Rd corridor would not have the Citaros they have at present if you gave them shoddy old Northerns...
RE: Go North East Service Suggestions