Even that is turning up 2 hours before the main game starts. How would this work for the Fri 6pm game? And would any league fan in the audience watch the Reggies when they could pull out their mobile, or stay at the nearest pub, and watch the NRL game being played at the same time (as it will be for the majority of games)
It's just not feasible in the modern world, no other major sport plays prelim games anymore, its really a relic of a bygone era.
The modern fan wants to arrive in their seat 5mins before kick off with a beer and hand, and have to walk no more than 20m to get refreshments and have a piss.