If the weather is that bad that the few aircraft equipped with GLS are requesting to do that approach, it is highly unlikely you will be flying the route VFR at 2000'. When descending into the major airports, ATC clear the jets to descend to 500' above the CTA steps. I have never heard of any light aircraft encountering WAKE turbulence in these situations.
i really don't think wake turbulence is a big issue. The new 2000ft step already has a buffer from the approach gradient.
The big issue is that after about 40 years of precedence and ingrained habit, CASA is changing the direction of flight at 1500 ft with no effective education or communication programme. The major risk is other head on VFR traffic that are still using an old VTC or flying levels from memory. The jolt from a mid air is bigger than the jolt from wake turbulence.
And CASA has continued these levels to Carrum and that the southbound recommended altitude of 2,000ft is an IFR level and crosses 3 IFR routes with lowest safe altitudes that allow IFR aircraft to be flying them at 2,000ft - whilst probably being on a different frequency (IFR will be on ML CTR, many VFR will be on MB tower). Why we need to continue these close separation VFR altitudes past Point Ormond under a 4,500 ft step is known only to CASA and they don't seem to be talking to anyone. But after Nov 8 (17 days and counting) anyone going for an around the bay flight and flying the levels they have had drummed into their memories may find themselves head on with aircraft that have read the new maps and noticed that the text in the call out boxes has changed.
While Squawk 7700 notes that AvPlan & Ozrunways are concerned about trying to help communicate the changes, they are not permitted under the terms of their licences to change or amend the charts. So, they cannot add any notation to the Melbourne VTC that does not show any warning of the note boxes. These are on the Moorabbin enlargement which AsA doesn't include in the electronic version. So, there is a limited amount they can do. I think we'll see them alerting their subsribers by email, blog and maybe pop up messages on the programme, but thats pretty much the extent of their ability under the AsA licence agreements. This is a CASA created issue and its a CASA responsibility and so far they are absent from the room and not showing much interest or care. CASA has clearly shown disdain for communication with industry, RAPAC or the OAR .