Sorry to unfloat your boat, but there were not 54 musicians playing in that pit. Yes the Australian Opera and Ballet Orchestra has 54 players on contract, but not all play at every performance. If you had ever been in the pit of the Opera House, you would realise that there is barely room in there for 30 players.
I saw this production twice, and didn't like it either time. Yes it was gorgeous to hear the full orchestration and to see Roger Kirk's extravagant designs, but there was no thought or depth in the production - it was very superficial and shallow. The vast majority of the comedy was lost, and although the cast's vocal performance was admirable, I was let down.
Trevor Nunn's production is so much smarter than this one - I spent the entire show thinking of how much better the show as at Menier and also at the Garrick last year. A big let down
However, I don't blame Opera Australia - they were playing this one for their blue-rinse subscribers.