Must have been a peculiar set of circumstanses to cause the crew to elect to make an emergency lob into Brisbane, maybe use the brake hydraulic accumulator to stop and then be unble to clear a main runway.
A fair few brake applications available after a hyd failure, not much in the way of nosewheel steering though. It'll be interesting to know why Amberley wasn't used - bound to be a good reason, you wouldn't just lob into Brissy 'cos you felt like it (Brekky Creek notwithstanding). A hyd failure on its own isn't hugely time-critical - takes a fair while to activate all the alternate systems, so you can't just fling the jet at the nearest available strip of bitumen.
The real question is, what on earth were they still doing at work at 5 pm on a Friday??!! What is the RAAF coming to??