Just thought I would add some ideas ive been working on (bad cold, so been stuck in...; ))
The design would see the re-creation of Liverpool Exchange as a new hub and alternative to Lime St. With all the talk of creating new high speed lines across the UK, the design responds to the need for a new district and expansion of the city centre, particularily the commercial district - to the north ideally.
Utilising a cleared series of spaces from the Former Exchange station site, across Leeds st and Atlantic Boulevard/Costco, the Line would then regenerate the disused waterloo tunnel before meeting existing main lines at edge hill.
The redevelopment of the Costco site could also open up possible high rise/density developments both commercial and residential/mixed use. This station would also feature direct access to Moorfields, perhaps even the complete removal of the station entrances to a new space within Liverpool Exchange.
Just some thoughts. The area has been left barron and redundant since its former use as a transport hub and destination, perhaps to reconnect this area is to return it to its previous function? at least as a starting point?