It says that the flight would run from Perth domestic not int'l: why would they do that?
If they could make the transfer seamless it would be a pretty good way to go. I assume they lineup as many inbound flights as they can and actually have a real hub connection. The downside to this of course is how long do you wait for a delayed connecting flight. With circa 17 hour flight time noone wants another 20 minutes waiting for the MEL/SYD/BNE aircraft to arrive.
Much more to see and do, if you so desire, in Dubai than Perth, likewise the facilities at DUBAI are no doubt far superior than PERTH if you were just transiting.
Maybe so. But if QF play this smart you should be able to walk straight from your domestic flight through customs and be boarding within 30 minutes. You don't need 3kms of shops full of stuff you can't afford if it's a short connection. Dubai is built around 2 hour+ connections.