Why let JQ run to AYE when QF has a monopoly on the route and can pretty much charge as they please? Makes no sense when you slug them for premium prices.
As for the parking of jets, classic retirements are nothing new, parking a 737, probably a Jet Connect 300, they didn't spec mainline, probably replace it with a 400 from the mainline. Another 800 is just about to turn up along with a few to follow. A321 is surpirsing but if the airframe is rubbish then that is probably a good thing.
Having a look at the routes and especially the turn around times is a good thing. Nothing spells delay and therefore more fuel burn than 35 minute turnarounds with aircraft changes.