330 gates
I think there are only three 330 gates available in SYD unless you are counting 7B, the use of which screws up adjacent bays.
Perth has three, Melbourne ditto, and I think Brisbane has two.
Since the 787 is also too wide for the existing gates they will need to do some terminal work for the future, or resign themselves to single aisle jets for much of the east coast flying.
Also, the 330 is more cumbersome to turn around...you need at least an hour, and most of the aircraft lack brake fans which means engineering support with fans. Its common to have three or four engineers attend a 330 station stop, contrary to the new plane reliability credo.