I would reckon give it maybe 2 years and Jet* Domestic will have business class, meaning the return of "choice".
Funnily enough, someone in Jet* will come to the blinding realisation, almost a Damscene conversion, that "THE MARKET" in Hobart, Cairns, Hamilton Island, the Gold Coast etc. is "DEMANDING" a business class product. Remember, "We'll never use allocated seating!". What a crock that turned out to be.
QF has pulled out of Hobart and Hamilton and has all but pulled out of the Gold Coast and Cairns. So who'll be left to provide a J class service? Jet* of course.
It may have initially been about growing the low yield market (I don't personally believe that for a second) but it's now all about screwing down wages and conditions. You'll pay the same price as you used to for a QF J-Class ticket and get the same service. It's just that the people who provide that service will be on roughly 40% less than their QF equivalents.