Rego of engine change aircraft is VH-VKA. Doesn't seem to be the most rapid engine change ever carried out either. A few hiccups perhaps?
Jeebus... The first ever 787 engine change in Australia, and people are moaning about the length of time it takes? Considering the guys would have done the initial course and PCT only - do you really expect them to rush it out the door if you mentioned there was a second aircraft on the fence anyway? Take your time, teach as many engineers as possible the little tips and tricks so that when the aircraft enter REAL service, a more efficient engine change can be accomplished.
Anyway, who is doing it, JHAS or Korr? If its JHAS then a delay would be expected. They probably backed the engine over a bollard or two...