The USA market is not the TransPacific market. And the USA question relates more to routes at busy times and customer loyalty. If the 17:00 daily flight from A to B goes out with an average 98% load factor in Y, offering upgrades to people who fly (your airline) a lot may keep them from going to a different airline.
With Oz and TransPacific routes (at least until very recently) QF could sell the premium seats. Or at least most of them. And there were no alternatives. And the premium seat fares continued to climb. To the point where people looked for alternatives. And use of the CirclePacific fare became worthwhile until a very serious fare increase reduced that utility. And people looked at comparable routes (distance and frequency) and found competition does make a difference in the fares. And their concept of airline loyalty took a big hit.
Well now QF finds they may not be able to sell all those premium seats.
And QF's flyers (not the credit card mileage people) are still wondering what loyalty QF has to them.
Well for the QF lurkers I offer a couple of suggestions - assuming they want to retain the loyalty of their frequent flyers.
1. International mileage upgrades are confirmed in time sequence by status. Look at AA's domestic sticker upgrade timeframe. No guarantees but more frequent flyers are treated with more preference. And people with miles but no status find upgrades VERY difficult. Full awards are the category that depend on miles.
2. Longhaul flights will never depart with more than 2 empty premium seats - IF frequent flyers have asked for mileage award upgrades.
3. Flight earnings are comparable with flight costs. Economy is the base. If business awards are charged at 200% of economy, paid business earns 200% of economy.
4. It would be nice to have an economy seat with more space on flights of more than 6 or 7 hours. No additional service - just space -
there is really no major flaw in QF's economy service; it's just not premium cabin service. And a corresponding Y+ price not a J- price. I am aware of the failure of AA's more room in coach. But the AA routes in that case are not the length of TransPacific or the Kangaroo route at 13 to 24 hours.
5. Fuel surcharges (I suspect they will occur again) never last more than six months without being merged into the base fare.
6. Star class and flexi JQ fares are eligible for (reduced) partner mileage credit.
I still find the SIN market more to my liking - though the fall of the AU$ makes the OWExplorer fares (xONEx) exAustralia attractive.
I never expect my views to be considered conventional.
Fred