4/ Rather than fiddle with SC/point earning rules, simply increase the ~ requirement for Status Levels.
Eg. 4~ required for Silver.
8~ required for Gold.
12~ required for Platinum (or even 16).
Can't agree with this. Way too easy to get Platinum. If all those ~s were in international J, then yes. Domestic J, still a no. But if they are in Y, then too many would get that in the first month; holidays to Europe = 4 to 6~, then 3 or 4 work trips SYD-MEL and you're a plat! Crazy talk. For the other 11 months you can then chase status on DJ. Or fighting the hordes of recently upgraded people to the lounges. Not a good idea thing for QF, or the current SGs with Club lounge access or higher.
The ~ system wouldn't work as it doesn't differentiate the different earn to Qantas based on J or Y, flexi fares or red e-deal etc.. Pure red e-deal flying, then the ~ have to be closer to 70 a year. Reflecting those that travel each week for work and being rewarded for staying with QF. But an international J flyer will probably require 8~, domestic J would require 20~ and then flexi Y would be closer to 40~. And so you see- it has now become as complicated or more so than the current system. So, it doesn't make sense to change to this.