Encountered the same problem with CX last year on HKG-SYD and I understand that they received many complaints. All J class passengers want is a CONSISTENT product and service. To be fair to Qantas, you always get their current seat on all international J class sectors north of Sydney. Am going on SQ next month to SIN and then HKG. I suspect that I will be dealt the same treatment by SQ.
The key question is why do (almost) all travel journalists praise SQ- why aren’t they on to this. It is about time that the journalists at Business Traveller said something about it.