The Real Problem
The real problem at Sydney is that 34L/16R is far too long.
It should be shortened to make it a less favorable choice.
Reduce its length, say, to "F"
The added benefit would be uninterrupted crossings at "A"
Normal international practice for rwy assignment is according to the direction of approach.
IE at sydney, from the east 16L/34R and from the west 16R/34L
The use of overfly circuits are discouraged because they create airborne conflict and reduce safety margins.