Problem is C441 that in most 'big' airlines overseas NPA's don't significantly feature in the training regime. Most if not all emergency scenarios in the simulator end with an ILS approach to a 3500m runway, couple that with the 'unique' australian rules and it is no wonder these incidents keep occurring. Take the visual approach rules for instance, normally when cleared for a visual approach overseas all it means is that you have the runway in sight, you are then free to manouvre the aircraft as you see fit whether it be day or night, no such thing as you must maintain msa until the circling area etc etc. Certainly no CTA steps to contend with. The crew in this instance totally screwed the pooch, and it is not good to admit that some pilots flying these aircraft are not capable of flying a managed NPA but in reality we are seeing increasing evidence of that. OZ is a uniquely challenging environment for foreign crews, the sad part is that it isn't due to weather, terrain or any other environmental issues, it is down to the crap rules, procedures and lack of proper infrastructure.
When I first joined a longhaul fleet for a major legacy carrier in Europe I asked a Captain what his favorite and least favorite trips were. Without hesitation he said Australia for both. Favourite because it is a cracking country to visit, least favourite because of the Aerad (Jepp) differences section, poor ATC and total lack of well equipped airports.