I see it a different way. I think The A330 was an incredibly special sweetener deal tacked on to the A380 and I don't remember any fanfare when they brought it in but it allowed the airline a relatively cheap breathing space between the 767 retirement and 787 introduction. Its my impression that the B787 not A330 was to replace the B767. In hindsight I think the airline did not count on the financial difficulties plaguing not only QF but the industry as a whole ( in last few years dating back to the GFC) and the delays with the B787 introduction (whether airline financials or manufacturer delays) has I think made the A330 an astute/lucky acquisition whether by lease or otherwise.
Yes, there is no doubt that the acquisition of the A330's has been a godsend for QF; without them, they would indeed be in serious trouble right now. But that in no way invalidates the fact that the configuration of the 332's has been mishandled, leaving QF with a substandard product on a significant number of routes. Apparently some people are completely mesmerized by the terms "suites" or "flat beds" but from my perspective there is a bit more to it than that!