I disagree with you conclusion. The plans looked well thought out, with office buildings above the station matching the current 1 - 4 Snow Hill. The station entrance was to be where it is now and also on the side. The livery Street car park is never more than half full and never has been.I remember the old plans to move the main entrance to a pedestrianised Livery Street by The Old Contemptables!
Very much pie in the sky, part of a re-imagined Snow Hill area.
What scuppered it was Covid tbh.
I believe Birningham Council are still persuing the crazy idea of pedestrianising the A38 at Snow Hill which would have fitted into the overall scheme.
Back to the Midlands Rail Hub. Platform 4 work at Snow Hill has stopped. Apparently someone looked at something, took a load of photographs and worked stopped.