Here is an interesting scenario for us all. A blade separated and based on their training and information available to them they decided to return to Perth. This crew appear to have got away with their decision. So we have to leave them alone. But now we have the luxury of an incident where nobody got hurt and add to our knowledge. RR and Airbus should now tell us if there is any technical reason if this was a good plan or not. Then, we can add this information into our knowledge banks and make better decisions in the future.
Personally, I would have left the plane and passengers in the middle of nowhere. If you run an airline that flies over remote parts of the world you must expect that every now and again your aircraft and passengers might end up in the middle of it.
PM