My point is that I am trying to make is that the tour itself was not something conducted by use of any company supplied fixes if I am understanding the information correctly.
The waypoints brought you to a point where you would then begin a "visual tour" your statement implies to me that they actually conducted the tour by the use of some waypoints, one waypoint which ANZ changed considerably the night before departure.
After they transition to a VFR tour, it is then the responsibility of the flight crew to understand that they are solely responsible for identifying their location before conducting any descents, regardless of some visibility report given to them, and what airline crew would assume they are under radar control based on the the fact that a light on the xponder is flashing, these aren't ppl's, these are seasoned airline pilots.