Another VLOCITY transfer today via Gheringhap what actually needs to be done to make this work? Not much I say.
Line speed is currently 80km/h. A Vlocity would struggle to beat a coach with that sort of limit in place.
To improve that, among other things, level crossings would need to be improved, some only have a Stop or Give way sign, most still only have flashing lights and bells, only a handful have boom gates.
Add to that the need for new stations, at the very least Bannockburn, probably Meredith as well. In both cases the old stations will simply not cut it.
Then there is the fact the line has been slated for gauge conversion. It was supposed to be underway already but with the delays to the Murray Basin project, it may be another 18 months, but it is still happening. V/Line currently have no SG rollingstock suitable for this service.
Finally, there is no Standard Gauge path from North Geelong "C" to Geelong station. This will need to be built to operate this service. This is likely to be the most difficult, and the most costly part of this project.
So, to sum up, level crossings, intermediate stations, rollingstock and an SG link through North Geelong is what your saying is not much work.
Not that I don't think it should happen, just that I understand why it hasn't so far. I still believe a SG Vlocity running from Maryborough to Geelong 3 or 4 times a day would be a worthwhile service, but there are quite a few hurdles to jump first.