I am not convinced that the closure of the old East Lancashire lines is actually that short sighted. What trains would benefit from their reopening?
I believe that Preston could benefit from having the old RES platforms back in use so that there was a north facing bay as well as one more through platform for Blackpool trains.
However, ignoring that there is a 2 track section between Farrington and Skew Bridge there is still 4 tracks from the station almost to the junction now used for East Lancashire trains.
The main reason I say that the closure of the East lancs lines was short sighted. Not only did it give people who live around Todd Lane Station a decent rail service into Preston, as well as to Ormskirk/Liverpool and East Lancashire, it also kept the trains to those places clear of the WCML, where they use up valuable capicity. Using the old bay platforms 10, 11 & 12 would have meant that you weren't guessing which train is which on the current platforms 1 & 2. When ever I have used them recently, I was told the wrong train at least on 1 out of 3 occassions. Better information is needed. In fact the last time I was trying to catch a train to Bolton which was starting at Preston, I was told it was the middle of the three trains on platform 2. I discovered that it was wrong as we took farrington junction, fortunately it was a East Lancashire train so I changed at Blackburn for Bolton. Both the platform staff & the guard leaving the train told me it was the Bolton train, silly me I should have asked the new guard to confirm the information. I was one of 8 people who thought they were on a Manchester train. If the trains to East Lancashire were still using the old East Lancs platforms it would not have happened.
I agree with you that the should reopen the old platforms 1 & 2 (the RES platforms) although they will have to remove the blockage they built on platform 1 which made it a double bay platform, accessed from either end, but no longer a through platform.
What 2 track section between Farrington & Skew Bridge??? There are four tracks from just south of the reopened Balshaw Lane & Euxton station through to Skew Bridge, were they become 6 track into Preston Station. The thing I have never been able to understand is the de-quadrifing of the WCML between Standish & Balshaw Lane. This really needs to be re-quadrified, and at least the Station at Coppull reopened. This could be done as an island platform, the underpass is available, and the space is there, as there was space for two platforms and two tracks through Coppull.