Why is it weird coaching? He solved an issue for Allegri, he did not have other alternatives with Pjaca injured and Cuadrado fatigued, only other option was Dani Alves, but he isnt physical enough match up there and he is better in a scenario where we keep most of the ball not see 20% of it...Lemina was only CM who could play that makeshift role he got, physical, all around player who likes to run with or without the ball plenty. It didnt work out too well, but for the minimum task of minimizing risk it was alright for Allegri, kept the teams shape intact which is why Allegri is playing players out of position like this, to keep going what works for the team, this formation, even if we dont have the squad for it.