The intersection of 06/ A/ J2/ J1 was always a bit of a mess. J2 had a high speed taxiway ‘vibe’ about it when it wasn’t. When exiting J2 on the 767 by the time you came off the runway and transitioned to the taxiway you had one aeroplane’s length to stop before 06. When taking off on 06 I was always very cagey about aeroplanes coming off 03 onto J2 and kept a bloody close eye on them.
Add the late changeover in duties that afflicts all QF 737s (all 737s or just those in Australia?), new F/O, lack of familiarity with PER by both crew, an incorrect mental model for the Captain, and voila.