DL leaving will have an effect on the training and will effect certain ways they set up. But generally its a team shape when we haven't got the ball. So certain errors are just individual brian farts as they are still pretty inexperienced group at this level. Probably why Bidwell doesn't really make them, he put himself in good positions and does the basics of his job well.
Robins will get someone in before preseason and new and old players will adapt. Thomas and Kitching will be a better for all the experiences this season.
