It is a great fare but be aware that QR has zero availability in any fare bucket to Australia until Dec 18th and at the above price no availability until Jan 10th. If as is ilkely the Australian Government continues border restrictions then the zeroed out availabilty will no doubt be extended past Dec 18th. If you purchase this fare for Jan 2021 onwards and have the right to enter Australia under current border restrictions there is still the chance of your reservation not being honoured depending on how many passengers Australia is allowing per arriving flight (currently around 50 I believe)
There was a recent story of a high tier Emirates FF having his Business class reservation LHR-SYD cancelled 6 times because of the government restrictions. I don't know if QR has similar passengers floating in the ether