I'm also aware a TWAO was submitted for Castlefield. 8 years ago. It was Graylinged as too expensive
I'm just saying it could meet the same fate
I'm putting Piccadilly 13/14 in the "overtaken by events" box now.
AIUI the Task Force options were developed by Steer consultants under contract to the DfT.
Steer appointed to work with Network Rail’s North West and Central Region | Steer (steergroup.com)
Who almost certainly answered the exam question set to them - come up with a train service that is operationally robust on the current infrastructure. Which they did (on the assumption that stakeholders can be brought on board, and that it can be resourced with trains and drivers, each of which is for others to make happen).