It’s also worth looking at different departure and arrival airports in Europe. QR sometimes has deals on eg Dep FCO and Arr AMS.
It’s very short notice for Australia in J and January is peak season.
Qsuite is a good product but there are many who prefer the older J seat.
I went to Australia earlier this month and had a mixture of Qsuites on 777s and standard J on A380s and I have to say I much prefer the A380. It is also a much quieter plane.