Like many Ppruners here, I have flown the 18 ILS at AV and would say it is not too overly complicated. I have also seen at first hand how Tiger pilots are trained in the A320 sim for circling approaches and that training is nothing short of first-class (while not defending Tiger the airline though).
I have a personal suggestion for the shareholders of Tiger : apart from getting your act together, find a substantial Australian partner to strengthen your local political connections. The painful demise of Ansett is still too fresh on our minds but the lessons have not yet been learnt.