Ah the old MEL SYD BNE is busy thing. Maybe from point to point on a nice orderly flow along pretty standard airways.
Europe with multiple airports with more movements than SYD or MEL scattered randomly anll over the place and aircraft departing all over the place. There is no comparison. SYD at it worst is tumbleweed town compared to a lot of Europe on a normal day.
And yes top marks for London controlling.