Yeah. Can you cancel and book with avios?
Even better- I didn't book it yet
All I have booked so far is ORD-HKG in CX J, and MEL-AUH EY F.
CX flight is with AS so totally cancellable, and EY is with AA so can change dates/times for free. So lots of flexibility.
HKG-SYD apparently has horrible availability, nothing on my dates or even close, but anyway it seems hit and miss with good reverse herringbone J vs old yucky J... HKG-ADL has availability AND has good J, but only 1 flight per day. Still waiting to decide if it's worth liquidating my last 12K SPG to AS to do this flight (I have 8K now) or figure out something else... Will probably just do the SPG route.