There needs to be a base level of qualified personnel to work on the aircraft. As the numbers of aircraft increase the number of attending engineers in the 380 team will probably not change at all.
There will be no increase in the number of A380's for a number of years, if at all, due to AJ deferring/cancelling the remaining order of 8. As the number of international sectors decrease, so does the requirement for extra aircraft.
Currently they have the numbers to build enough experience to suit the Qantas fleet, too many less than current and you can't ramp up aircraft numbers. Once they're trained they need keeping current so until more aircraft arrive over which the 380 team must be spread it gets a larger number of attendants.
Plus they get to work on sorting out those initial glitches so extra manpower as a risk mitigator is easily justified.
Redundant statement. No ramping up of aircraft numbers, therefore too many "attendants".
Also, the A380 can't be used on the DFW sector, but the outdated 747 can, albeit the return sector is via BNE. What happens when the 747's are finally retired? No 787 to replace them, and the A380 is useless, unless it carries a greatly reduced number of passengers.