Finally got round to watch Saints v Castleford and there was an incident towards the end of the game where Saints got the ball after a Castleford knock on and then the free play was stopped for a Saints scrum after an obstruction.
I've got to say I didn't like it. When a team has a free play and the player with the ball thinks that there is nothing on he can basically just run round the back of a teammate to stop play and get the scrum. IMO if the team with a free play commit an offense that is usually a penalty than the penalty should overrule the knock on.
What? Why would anyone actively choose to do that? If there was 'nothing on' they could just take the tackle and make a couple of yards.
Seriously, it's a sad indictment of the intelligence of RL fans that such a simple rule has caused so much misunderstanding and confusion. There's not even any such thing as a 'free play', they just removed the advantage line being determined by the ref, which was an archaic part of the sport that needed to be changed.