Circling approaches increase the chance of CFIT when compared to straight in NPA's which in turn increase the chance of CFIT when compared to conducting precision approaches. Statisitcally speaking, the increase is not negligable which is why so many governing bodies and airlines no longer allow pilots to circle in jet aircraft. Australia will catch on eventually.
Centaurus has earned the right to contribute more than most of us here and represents the old school stick and rudder approach to airline flying. The demand for airline crew in the developing world combined with the current worsening pilot shortage and the almost exclusive employment of automated glass aircraft will render the old school obsolete.