That Qantas choose to have no data on crew is interesting
It is also wrong.
There already is a fatigue study going on at Qantas for 787 pilots on ULR ops. They are using an external company, in conjunction with AIPA, to asses the rest attained and resulting fatigue of crew flying these sectors. It uses a questionnaire on recent sleep/wake history and an app to asses real time fatigue levels.
They are also looking at A380 crew to get a baseline from which to compare.
The main problem with the study at this point is that, disappointingly, not enough crew are volunteering to participate in the study in order to get sufficient data.
Yes, it is a different study than that of the passengers, but for many obvious reasons that is entirely appropriate.