The last bit I can well imagine, but I think you've got your wires crossed on the rest of it somewhere.
From the RUS:
Option RL2 contained two considered possibilities relating to Preston, both of which were rejected as being non-viable:
Option JT3.1 considered, as a sensitivity, extending the diverted interurban service between London Euston and Crewe to Preston, calling at Winsford,Hartford, Acton Bridge, Warrington Bank Quay and Wigan North Western instead of to Liverpool Lime Street via Runcorn. This is expected to provide a low value for money business case due to the high operating costs associated with this option. This option is therefore not recommended.
The alternative of diverting one of the two existing Birmingham New Street to Liverpool Lime Street trains per hour to Preston if the London Euston to Crewe interurban service is extended to Liverpool Lime Street via Runcorn was considered in option RL2.1. This option had a low value for money business case as the disbenefits to passengers travelling between Birmingham New Street and Liverpool Lime Street outweighed the benefits to passengers travelling between Birmingham New Street and Preston and is therefore not recommended.
Extension of the London Midland Crewe - Euston up to Liverpool was mooted in JT4.2 North West Package, but couldn't go ahead until the Stoke issue had been resolved. As that has now been resolved, I expect that the extension will take place at some point in the future assuming that any objections can be overcome.
Therefore, the extension of the London Euston to Crewe service to Liverpool Lime Street cannot be recommended as no value for money way has been identified to replace the connectivity at Stone station and the rest of the Stoke-on-Trent corridor. It is recommended that the Industry Timetable Working Group considers how the connectivity could be replaced on this corridor which would then enable the London Euston to Crewe service to be diverted and extended.
Source Network Rail WCML RUS July 2011.