Dont confuse delivery of this project with ATC provided. Given the limitations of the organisational culture they work under Aussie ATCs do a pretty good job.
The role of GM ATC (sorry executive GM) does not have responsibility for this projects delivery. Still waiting for a permanent apointment to GM ATC.
Given the talent left in managerial ranks after TFN left (i will make an exception for Hoody, but he left and came back) I would be looking at an external into the role.
But I digress, this project will not deliver some of the stated benefits.