I think domestic fares have crept up ever since VA and QF quit their Capacity war a year or so back. Plus QF have reduced capacity a bit with the rmeoval of many 332's from domestic triangle routes (and some transcons

) to fund the trans tasman services, so there's a slight reduction there, and neither QF or VA have incentive to really push it like they were during the capacity war where they were dumping cheap seats like candy and losing bunddles.
Internationally there's far more pressure from foreign competition and other factors influencing things (for example, QF could well feel pressure from carriers like Scoot, and the Asian carriers putting more capacity into oz - eg multiple frequencies in a/c like A350's by SQ, CX etc)
Plus UK pricing has hit the toilet since brexit, where F fares under $10k are not unusual anymore (compare this to a few years back),
QR dumping relatively cheap J fares into the market too also put pressure on, and QR's doing that because of their own situation in the ME right now.
Or, look at carriers like AC opening up routes like MEL in addition to BNE and SYD and this puts pressure on Canada pricing too.
Soo many factors inflencing markets out there....
I also notice QF had a period of single day "rush sale" fares late last year, but they dried up during December but those got you Y fares to China for $500 and the like.. think this kind of thing may return if QF found it worked... so you have to be quick to get these
we live in interesting times (in certain markets) but probably not so much domestic
my 2 cents