It's all about expectation isn't is.
People don't mind Kershaw or Hall making a mistake as they are just starting out and expectations are low.
But Taufua, Atoni and especially Proctor have NRL CVs where you expect more, and I assume are paid accordingly.
Taufua I think is putting 100% effort in but the very fact his highlights reel shows exceptional defense not attack shows he's not going the length.
Atoni I guess is more about his size. He should be able to bounce people around. I'm sure he's targeted because he's so big but he literally hits the floor on first contact. I did wonder whether he's trying for a quick ptb but it isn't working. He needs to get post contact metres and disrupt the line.
Proctor again has played at the highest level but his highlights reel shows immense work rate, great defense and tries getting on the end of a good pass. None breaking tackles though I'm sure he did. Take away his fitness and his NRL team mates and actually he's the same player as Pitts and Pitts is playing better. The only thing in his favour over Atoni is he looks like he's breaking his neck to be better and is vexed off when he isn't, but at the moment, he isn't.