He's probably thinking he needs to teach them how to defend properly. Build from the back and all that. If we've got incredible talent going forward and moyes snides at the back then the attention should be on the defence and the talent will shine regardless (that's what talent does).Well that's a massive problem then isn't it? We should be able to keep possession and build or counter. Koeman has us so far back with a lot of players behind the ball that we dont get the breathing space to carry the ball out that far and find players in space to construct moves.
These players were taught to be able to retain the ball and move it around. I suggest he starts using that ability before the dozy gets forget the skills they were learned and we become even more of a team needing to launch it long again.