DB
Yep, I can second your 777 captain's observation about loads on the 15, it's quite often v full between SIN and SYD.
However what we don't know is what folks are paying for the seats. There's also a problem with aircraft utilisation- when the aircraft gets to SYD early breakfast time it then sits on the ground not earning it's keep for 8-9 hours before it sets sail northbound again, something the accountants don't like.
Edit to add:
azz767
Do we think, like the QF/EK we could see both airlines use the A380, meaning BA put one on the Doha route]
A Doha " terminator" perhaps but for the foreseeable future I don't Think BA have got enough 380s to do a UK/ME/Aus rotation without pulling the 380 off other routes. Depending on timings you might need at least 3 hulls just to cover that one service.