I will answer as best as I can, given not all the questions have answers yet.
QM2 finished her World Cruise early in Fremantle/Perth and it is not known when exactly she will arrive back in Southampton. Her next port of call appears to be Port Louis, Mauritius according to MarineTraffic but I would take that with a grain of salt given the uncertainty and that the likes of MarineTraffic are not always correct. She left Fremantle at around 19:30 local time last night (roughly cross checked with information given out by Chris Frame).
QM2 gave Far East Asia a wide berth and substituted her original Far East Asia itinerary with one based around Australia including visiting Sydney and Adelaide among around 6 or so ports I seem to recall reading.