I assume this is directed at me. It is totally wrong to say I prefer to fly economy :-| It is also totally wrong to say I can't see the OP's POV or that I'm taking them to task. I can understand their disappointment, but I reject the reasoning used to claim that the 734 should not be used on MEL-PER routes. I have no empathy for someone who says that something isn't good enough for them, so someone else should have to suffer it.
If I was flying PER-MEL every week I would be more than happy with J in a 734.
BTW looks like Qantas has read this thread and responded to the OP because next Monday and Tuesday QF 480 is $1235 for J. That's with a 734 on Monday and :shock: a superior 738 on Tuesday. Oh, but look out the 332 for QF648 and QF802 are also $1235.
Just checked some more and every QF480 from 9 to 21 August operated by a 734 is currently available for $1235. It is also operated by 767 twice and 1 or 2 738s