Since no-one in the Qantas Group has any 777 time and the 787 is a common type rating wouldn't it make sense for Jetstar to get at least a handful of DEC 777 drivers to ensure the 787 introduction goes well? They can also no doubt train those mainline pilots lucky enough to get a slot on the 787 in a few years when the 787-9s come to Jetstar and the 787-8s start flying domestic routes.
I imagine there are other skills that such a few such 777 DECswould bring into Jetstar that would be an asset to the group as a whole. Things like ultra-long-range operations, extreme winter operations, routine cat 3b, 207 minutes ETOPS, polar operations etc.
Anyway, I presume from the deafening silence that everyone is happy with the EBA vote result and now you can all get on with flying.