I have 3 rule changes...
1. A charge down does not restart the tackle count, just restarts that tackle.
If you get charged down on tackle 5 but regain the ball, you get 1 more tackle to get a fair kick away. Charge downs are a great defensive play coupled with a terrible offensive play. I see no reason why the attacker should be awarded for putting in a terrible kick.
2. I would also like them to introduce the ability to stop the clock on a changeover.
When a team knocks on with 10 seconds to go on the 4th, a scrum gets packed and the clock is stopped, giving the attacking team a break to organise their final play. However at present if the same thing happens on the last, it is simply a changeover and the clock keeps running down ,forcing the attacking side to rush and pretty much spoil any chance at mounting an organised attack.
3. And finally, I would like a challenge system brought in.
The referee makes a decision on ALL plays (including tries) and each team is given 3 chances per game to challenge these decisions. if they get it right, they keep their challenge, otherwise they forfeit one. This rule is the most important IMO as it will not only stop us seeing 10 video ref decisions per game, but it will also increase the standard of refereeing as they are forced to watch the game more closely and make more decisions on the fly.