Sin bin - poor idea.
Teams with strong panels dont get deterred by sin bin offences. Also dilutes the punishment of the foul especially against match officials
The mark - nonsense, 15 second rule even worse.
20m distance etc, crap. To open to error.
I’ve said it for years, instead of a 13m penalty bringing the ball forward, bring 30m forward and EVERY PLAYER knows if they dont tackle fairly and then argue with ref, it’s as good as a score to the opposition. How many times have we seen an obvious foul and yet player fouling still argues? A free on halfway line and subsequent arguing would see the ball moved up to halfway between the “D” and the 45m.
Result of above would be, better tackling, less mouthing and overall improvement in the technical aspects of the whole game etc.
No need for Mark’s, forward Mark’s, forward passing only and sin bins.
Incidentally the 30m was proposed at Eugene McGees special rules conference and was overwhelmingly defeated.
Cos counties do not want to run the risk of 30m penalties against their players for shit tackling and/or mouthing.
Ask any player, take the sin bin or give the opposition 30m gain in free taking position and 95% will say the former.
Huge missed opportunity in my opinion.