Midfield is the main issue. Apart from Marchisio right now, we have no player worth playing.
Khedira, Pjanic, Sturaro, Hernanes, Lemina shouldn't be starting for a team aiming for the CL.
We went from the best Midfield in the world to a " i have no adjective to describe what we have now " in a span of two years.
We raised quality in other areas for sure, but we sold our best players 2 years in a row and we failed to replace them adequatly.
Unless Allegri decides to play with 2 man MF and limit the damages, we have no chance of making it in the CL with that kind of MF.