Dominant midfields haven't won a Champion's League in years.
The last 4 CL winner, Bayern, Madrid, Barca, Madrid... have all won CL with dominant attacking play, and dominance out wide. Solid, but never dominant midfields.
And that's exactly what Beppe is setting up with attackers like Higuain, Dybala, Mandzu... and wingbacks+wide players like Evra, Sandro, Licht, Alves, Pjaca, Cuadrado. We are going to have a very solid, if not excellent midfield once Marchisio returns. Khedira-Marchisio-Pjanic is a world class trio, and we have excellent cover for them with Lemina and Asamoah. Not to mention getting another midfielder, +Sturaro who often plays well against top teams.
Our improvement in attack and on the flanks easily makes up for the decrease in quality in the midfield.