There has to be a concerted effort to have International rules that are played globally including NRL & RFL. No point going off at a tangent if NRL won't adopt changes.
But, on scrums, I'd like a trial of this:
Attacking team ie. team feeding the scrum has to ensure that the ball stays in the scrum for three seconds.
On ball going in ref shouts "in". Then, after three seconds he shouts "ok" after which attacking team may release the ball from the scrum.
What if:-
Defending (non feeding) team pushes/strikes and get the ball out in less than 3 seconds? - that's ok.
What if attacking (feeding) team get ball out of the scrum in less than three seconds? - Tap penalty to defending (non feeding) team once ref has got other team back the 10 metres.
Note, refs often shout "out" anyway now which they should cease doing. It's the defending team's job not to encroach into the ten whilst the ball is still in the scrum.
Results of above suggestion? The scrum would be better packed and tidier (and no more scrum halfs etc in the front row!)
The defending team would have an incentive to push a bit. The attacking team would have to pack in properly to set a solid platform to resist any push from the other team.
Scrums should be retained as a feature of RL for variety and tying in half the defenders and whilst not wanting to go down the Union route, this idea would make them a bit more how they should be.