In regards to your last question asking whether the ruck speed has improved with two refs - compared the grand final from last year to the international games from last year, the play the ball speed is about a second half and a half slower with one ref compared to having two. Definitely more wrestle with the one ref
How many games are you measuring this by, and you measured this yourself? Not criticising, just curious the data.
NRL.com has play the ball stats on their website. Just about every international game is at slower than the NRL games. Here’s Roosters vs storm, two of the best wrestlers in the comp last year 
In comparison, this is Tonga vs Great Britain from last year 
Obviously it differs in every match but it’s always slower with the one ref system
I think this argument becomes irrelevant when you add the 6 again instead of penalty. The 2012 all stars game is the only match to have trialled 6 again. It was super fast.
I’m not sure it does. Giving away 6 again won’t deter teams from wrestling. If a penalty with a kick for touch doesn’t why would just 6 again
Because it's the speed at which the decision is made...a roll on 6 again doesn't allow the defences to continually reset as the game stops when a penalty is awarded and the kick for touch...
The refs still have the option to blow a penalty if they deem it so..like when Cammy is trying to rip someone's ears off...but can call 6 again if the defending side is merely deliberately slowing the PTB..
The only concern will be as if they are up to it..
So refs can decide whether they want it to be 6 again or a penalty..... that’s going to lead to a whole bunch of inconsistency and angry fans/players. Just more grey areas in the rules which is the last thing we need. Either make it 6 again for everything or did nothing
I don't agree at all. Right now it's penalty or not penalty. What difference is there if they introduce 6-again in place of a penalty? You will be able to tell, the ref blow a penalty or simply signal 6-again (we don't know for a fact what the gesture will be), and you'll know it was an infringement, and the beauty is the play will continue and you won't have time to waste to think about it any further.
And then if refs feel the infrigements are sufficient to warrant a penalty, i.e. kick for touch or shot at goal, then so be it. Or to stop a team and warn or sin-bin.
That's another thing I hadn't thought of - this will allow refs to reset a tackle count in tough situations like late-game or golden point, without having to blow a goal-kicking penalty situation.