ACMS, the decision about where to divert to is not so much driven by a quick recovery, but by what the day holds for the crew and aircraft.
Might be a quick 79 nm to Hobart, but how long do you sit there waiting for the weather to improve in Launy?
often it is preferable for the operation as a whole to bring the machine and crew back to Melbourne (or other mainline port) and shift the punters onto a later flight, leaving the airframe and crew to do something else.
having them sit in HBA for an undetermined amount of time just causes grief and screws the crew’s duty for the remainder of the day as well as the airframe, particularly if there are things like maintenance planned for the machine at night, which if it ends up out of sequence and overnights somewhere else causes headaches.