Quick update - we arrived into Melbourne yesterday. Flew business with Etihad from Manchester which was pretty hassle free. Only a 1.5 hr delay but apart from that, not much to report. First leg to Abu Dhabi was busier while the Melbourne leg had only 10 passengers on board (of which 6 were in Business).
Immigration, customs and Covid formalities took about 90 minutes followed by a 30 min journey to the hotel and 30 mins to get checked in.