Approx 2 years ago I attended a meeting that was hosted by AA at the MCG and all of the relevant helicopter companies were invited. Unfortunately a very busy scenic company based at EN choose not to turn up.
One of the issues identified is when EN airspace is under IF/SVFR conditions that helicopters get held outside CTA and they tend to orbit over Melb East. It was discussed to include an alternative holding area that was less noise intrusive as an amendment into the ERSA entry for EN.
There was plenty of other discussion, but I don't have a copy of the minutes. Someone from AA may have more details.
I will inform other members of the AHIA about this thread and info.