I am not saying that coaching isn't an issue as to why they are playing like they are, because I have no clue why they are playing like they are. What I am saying is that nobody could watch tonights game and come away KNOWING that coaching is the issue. Backchecking is not now nor will it ever be a coaching issue. Backchecking is not something that needs to be worked on in practice.
It's not just tonights game but a frequent thing throughout Yeos tenure.Bakchecking is coachable but is also a motivational thing,part the coaches job is to motivate his team.
Backcheking is absolutely worked on in practice,here is sn example of a backchecking drill...