When I worked in reservations (up until 2 months ago) we were frequently having to call out up to 80 pax on QF8 due to payload constraints.
I'm sure I didn't see this level of approbation for those offloads.
My most inventive alternative was DFW-YVR-SYD on AC!
Yes QF has the wrong fleet
B747-8 for long heavy haul
A330 in whatever guise (but only one model) for regional (Asia/NZ/Transcon etc)
A320 for domestic