2 confereces of 11 teams...
Play each team in your conference twice -20 games.
Random draw of 7 teams from the other conference to make up the other 7 games.
Top 5 in each conference play off in a 10 team semi final system.
They might be able to reduce travel for some teams, NZ, QLD and NSW teams generally in the same conference.
Canberra, Melboure and WA in with Sydney teams- 9 Sydney teams.
Newcastle and 2 Sydney teams need to be in northern conference?
The 2 new teams would need to be in QLD or northern NSW?
Avoiding the Warriors needing to fly to Perth would be the plus. Games like that could be removed from the random draw. Same for Cowboys to Perth / Melbourne.
Any idea is worth exploring, but this is tricky to get right.
A team in SA is worth exploring, but that means another Sydney team in the norhern conference.
The 2-3 Sydney teams in the northern conference would be on a rotating basis.
A least a team would not need to fly to Townsville, NZ, Melbourne and Perth in the same season.