So that mean QF would have 12 A380's, 9 B744's, 6-10?? 777's? And then a handfull of A330's still doing asian routes. 4 types between about 35 frames?
That's not much different to what they have now or what would have happened with 787s. It isn't ideal but it won't be fatal.
Also note that there are domestic A330s (and more coming from Jetstar) that will boost fleet numbers of that type.