Bathurst still hosts easter races, the 6 hr production car race is run at easter along with other categories.I think the expensive "supercars" would continue to come because there are not that many opportunities to show off what those "showroom" cars can really do or not do.
The track itself lends itself as an attraction.
GT3 might be popular in Europe but as they all look the same it appeals more to europe
still any event that brings in patrons and cash for Bathurst is a bonus expecialy if it can be shown on TV.
I used to like the Bathurst Easter races especially if I got a zoom around the track in a marshalls car between races.
Perhaps bring back some bike races as well.