Wow, that's quite the sop deviation by the flight crew.
Reading the pilot experience section of the report, it appears that the First Officer had "around 1800hrs of total flying experience" and only held a CPL Licence.
I wonder if a more experienced First Officer who had previous experience flying narrow body jets for other airlines would have questioned the decision to blindly follow the engineers instructions rather than use their own checklist. Or would maybe have thought to scan the overhead panel after a maintenance procedure was completed to ensure that all the switches were where they should be. I know what kind of FO I would prefer in the cockpit in that situation.
Perhaps the decisions of the QF "Talent Acquisition" people in recent years are starting to bite the company on the arse. I can't say that I didn't see it coming. There are pilots with plenty of experience on narrow body aircraft with other airlines that have been getting turned away from QF, some without even an interview. Boggles the mind.