I like the captains challenge, really hoping with it being introduced we will see a drop in ref bashing and more emphasis on the captains not wasting the challenges
We may need a little more honesty from players, too, at least until their side has wasted the challenge. I thought it worked well in the Charity Shield, but Souths wasted it when they blatantly knocked on, and the player whom touched it really should have admitted it immediately so their challenge wasn't wasted.
Overall, I think it will have minimal impact, but if it means teams have one less excuse to blame referees, then that is a good thing.