I see very little discussion and analysis of the economics of the international aviation market. The latter is a much, much bigger factor regarding new fleet than the former.
The economics of the International Aviation market are simple. Don't believe us, and as you seem to have a little trouble with research;
Qantas 'worst major airline' for fuel efficiency on trans-Pacific flights, study suggests - ABC News (Australian Broadcasting Corporation)
In summary the cost to deliver the RPK is 64% higher than competitors, that is
'aviation economics'.
Qantas still need a new fleet