Also I thought the paths were an issue at night because that's when the majority of freights transit between cities - perhaps this would also need to be sorted out prior to initiating the 'transit hotel' Overland.  You'd lose passengers/guests fast if the train was unreliable for that reason.

The imminent completion of the Goodwood grade separation and subsequent relaxing of speed restrictions should also help create extra paths (and allow more efficient 1800m trains) by way of ARTC no longer having to block out 5-6 hours each day when the local traffic is too dense for DPTI to release control over the flat crossing.

Torrens Junction is still a problem for freight service, but it would have no effect on a GSR train arriving from Melbourne in the morning which has no need to use that flat crossing on a time-sensitive basis, the loco released from the Overland could wait until after the morning peak before running to Dry Creek.