I suspect CFS is being prepared as an alternate for the 787 in the event that it is required for SYD or BNE. I'd be surprised if they start putting wide bodied jets in there regularly any time soon!
I think the dropping of the 'link' from QLink might have been a serious proposition at one stage but I have heard it was met with some regulatory issues and is no longer on the table.
The move to T3 in Sydney is definitely on though. Many steps have already been taken to make it so and I think it'll be a big win for the pax once the initial confusion settles.