Just a couple of questions -
a/ with the WX forecast for BNE, surely the Captain had enough fuel aboard for many more than ONE approach!
b/ why did he only carry out ONE approach, why not hold for a few minutes and try again, it's not a long way from Brisbane to Tamworth!
c/ when the aircraft is parked on the tarmac at Tamworth, why can't the pax get off and stretch their legs, and who could stop anyone anyway. When I fly as a pax I am not a prisoner of the crew, if I want to get off in that circumstance, I should be allowed to do so!!
These planning details would have been predictable before he left MEL, even for a not-so-experienced (usually) B737 Captain, surely he's seen this sort of stuff before!!
Cheers