Get rid of scrums,

Reduce the interchanges.
Have the same set of rules for all domestic competitions and international across the world.

I have wondered about having a 3rd, Regal Trophy, competition and reducing the SL fixtures to a simple play everyone twice.
The new competition would be played with 2 subs and only 2 or 3 interchanges (old school). I also thought we could use the 5m rule and push for a quick PTB, meaning a fast flowing game but less effect for scooting hookers and 5 drives and a kick rugby. This might encourage a bit of old school guile coming back into the game, whilst also minimising the physical wear and tear of an extra competition.

add 2 players per side, kick and chase, and a line out - NOT A CHANCE!

Kicking dead should result in a restart on the 30 or 40 maybe.
Get rid of scrums or change it.
All rules the same for all countries and comps.

Also. If a try is scored against Australia. It shouldn't be disallowed. Kind of gives them an unfair advantage.

Also. Shoulder charge brought back. Just give harsh punishments for head shots.