The "Beeching 2" report of 1965 analysed the 5 routes between Manchester and Liverpool (as well as Chat Moss, CLC and L&Y they also had via Tyldesley/St Helens (LNW) and via Lymm/Widnes (also LNW).
They chose the CLC and St Helens routes for development (although the St Helens route was effectively closed soon after as a through route via Tyldesley).
They also envisioned the Tydesley route as the main one between Manchester and the WCML.
There were some poor predictions for future traffic on these routes.
The CLC had "good connections into the Liverpool docks" (not true, and all gone now anyway), and good connections towards Sheffield (Woodhead - ho, ho!).
The coalfields along the St Helens route were supposed to have a "long life expectancy".
The L&Y route was described as "indirect", and Wigan could be served by other lines.
The Lymm route actually carried the heaviest freight.
All this preceded the major terminal rationalisation around 1968 which lost us Central and Exchange stations in both Manchester and Liverpool.
In particular that crippled the CLC route at both ends, and lost us the L&Y routes out of Liverpool (although we got the Link/Loop lines in Liverpool).