There's a real risk of event fatigue in Non RL cities though, and for fans who like to use it as an excuse to visit another city for a short break. I could see that working in Brisbane but not in Adelaide, Perth or Melbourne. Maybe 2 years in Brisbane, 1 year in other city, 2 years in Sydney,1 year in other city, repeat, presuming those cities are willing to stump up the cash to host. Gives enough gap to not get that fatigue and drives competitive bidding.
International season? lol
Just playing devil’s advocate here but the problem Perth has with potential grand finals is the cost of airfares. Unless that is alleviated then the Grand Final would become too costly for most. Adelaide don’t have the facilities (at the moment)
Brisbane and Melbourne could or would work though.