Keg,
The 330s should never have gone to Jetstar in the first place!
Older 767s were capable of operating any of the international flights that Jetstar international have operated to date!
This would have meant the ludicrous situation that occurs Sydney Honolulu,
QF operating old 767s next to the low cost Jetstar flying near new 330s would never have happened!
Air Canada recently started a long haul LCC, Rouge, no shiny Air Canada 330s for them, old 767s!
Then by now Qantas would have new 787s, either to take on Virgin to from Perth, or to do regional SE Asia flights, or a mix of both, as the 330s do now.
People who fly business class and or fly regularly appreciate a better product, and by all accounts the 787 is a big improvement for passengers, when compared to a 330 or 767!