Word on the street is that CX are currently doing a feasibility study to determine if it's more economical to close the Oz base as opposed to keeping it open.
The ATO most probably want CX to pay many years of back-dated payroll tax for crew based in Australia, when CX didn't declare them.
This would explain why there are very few Oz bases available in the current pool.
This on-shoring is beginning to bite.
Only time will tell....