In regards to the SYD curfew issue, why can't QF, and/or EK, fly into MEL/BNE before flying on to SYD in the morning and out again? For EK this would be 5th freedom (or some other lingo I'm yet to remember) and for QF it wouldn't be a problem at all.
Eg. A380 lands into BNE after midnight some time, unloads whoever is good there, continues to SYD with perhaps some new pax and the rest leaving in SYD, to be the first flight in the morning before setting off again to DXB.
Same could happen to MEL, SYD remains the hub and each leg you gain and lose pax so it reduces loads on domestic flights.
Of course, maybe a morning departure from SYD / after midnight arrival isn't what passengers want? But if curfew is the issue, this solves it?
Someone set me straight here.