Indeed, corridor-sharing for ~60 km (MTRL-COTO/DeBeaujeu) is less disruptive than for ~200 km (MTRL-Winchester-SMTF), let alone: ~500 km (MTRL-Kingston-Pickering).
Granted, the Kingston alignment allows to stop at different cities, but the entire HFR model of seperating primary (T-O, T-M and...