, although I thought one of the justifications for Crossrail was to relieve the Central line thus it basically parallels the Central Line across from Whitechapel to Paddington.
You are right. It is
one of the justifications. The problem I have with crossrail is that it doesn't seem to be sure what its purpose is (or in order to get support it is trying to please everyone). Is it essentailly a new tubeline or is it supposed to be more like Thameslink and provide improved regional services? If the latter then an all stations stopper is unlikely to improve many journeys and if the former then a few more central london connections would have improved the city centre connectivity.