The biggest argument from royalists against a republic is "if it's not broke, don't fix it." My personal opinion is that the royalist system by definition is broken. It values people at birth by virtue of who their parents are.
Quote:The final constitutional ties between Australia and the UK were severed in 1986 with the passing of the Australia Act 1986, ending any British role in the government of the Australian States, and ending judicial appeals to the UK Privy Council
Given this fact, it's unlikely that becoming a republic would result in any significant change in the country. But at least our armed forces enlistees would swear allegiance to this country instead of an absent monarch 12000 miles away.
