I'm a bit more confident than that Eddie. Cover ups are vigorously defended until they become indefensible. Then they often collapse spectacularly as no one wants to be caught in the fallout.
I suspect that may be the case here. New Director at CASA. A new Commissioner at ATSB (although I have not seen any confirmation that the new commissioner will actually replace Dolan and become the Chief Commissioner).
So people in senior roles with nothing to gain and lots to lose by trying to sweep anything under the mat.
Remember also the IACO / FAA elephant in the room.