I've just caught up with this particular thread, and have to admit, I have a certain fascination with the last days of Exchange. One thing that's always intrigued me is that moment when the tracks were realigned to approach Moorfields, rather than Exchange.. After the last train, when the realignment was completed, would that have meant no motive power would have been able to run into Exchange for asset retrieval? Before this event, surely there would have been a points split to run test trains over the new route whilst letting regular trains use Exchange as normal. Tracks were still in place at Exchange for several months after closure.
On Exchange's demise, it was ironic considering Merseyside PTE's pro-rail policy. The simple fact was that Exchange was situated in the wrong part of town, slap-bang in an ever diminishing business district, a fair distance from the main shopping area. When the Link was opened, it coincided with a massive reduction of city-bound bus services, particularly from the Crosby area. MPTE constructed a purpose-built bus/rail interchange facility at Waterloo where all local buses connected with the trains to and from the city that sort-of worked. A very similar scheme was put in place at Kirkby at a later date.