What about a stand alone Origin week with the game being played on a Saturday or Sunday night?
Origin is exceedingly popular in NSW and QLD and sells out and gets huge ratings and crowds non-stop in both states but because it's played on a weekday some people (especially in Sydney) find it to difficult to get there because of workday traffic, distance from the ground etc. If it was played on a weekend more people would find it easier to get there and there would be a better crowd demographic from a certain area.
It would make the NRL premiership more competitive during Origin as well every game would be the best against the best,