I wasn't sure if they were extensions to Blackpool, as you have 4tph vs today's 2tph. I think the Bolton/Chorley corridor could stand 6tph.
But in any case, I completely agree with you. And as I often bang on about, I would add the South Wales service into Victoria too. Gives 3tph to WBQ (to help CLC changes in future), opens up Victoria-Crewe as a connection, and removes a 2-4 car diesel path from Picc-Stockport-Crewe, which could be an 8-car semi-fast EMU to Crewe/Birmingham instead, or a 6 car EMU to Alderley Edge. Or maybe a Sheffield at a push, but preferably an electric, longer service.