There's still a huge problem with the Australian system - seat-based voting. I live in one of the safest seats in Australia, and thus my vote has literally zero effect on any election result - votes only have impact in swing seats.

This is also very unfair on third parties - under proportional representation, winning 10% of the vote nationwide means 10% of seats. Under Australia's system, unless those votes are very concentrated in specific seats, it means zero seats.