That is true, they are very conservative and extremely hardworking in their approach. Very demanding and unique for today, very tactically organised and rigid (really impressive defensive unit). Plus on paper its 4-4-2, but they essentially played 4-2-3-1, vertical and deep kind of midfield, with Griezmann being AM when they dont have possession and coming down to help. While one of the wingers is a fake one, in Koke, he is essentially an extra CM who goes central alot and helps out. While Turan did tons of defensive work he didnt like, pretty much stated that as one of the main reasons he left in his presentation.