Sometimes I guess that these things are 'calculated' mistakes. Rumours were circulating around 18 months ago that the 787 for J* were not fit for purpose. The fact that they have been pushed into service anyway would suggest to me that a decision has been taken higher up the chain regarding a much wider group strategy.
Any shrewd businessman would have seen the problem coming and would have taken the decision to place the aircraft with Qantas mainline to get the best utilisation out of them. The fact that they have not shows that they would rather place them in a loss making role within Jetstar to perhaps further strangle the dog that has become Qantas International.