The highlighted words suggest if you are right then it doesn't matter when the spend part is announced.
On last nights 7 news the QF changes were announced as positive changes for frequent flyers with millions of premium awards to be released. So just maybe QF didn't want to muddy the waters just now but later on. I suspect though about this time of next year when many are on holidays
But whether it is 6 months or 5 years very likely it will happen.