I think we have the right characteristics to play a 4-2-3-1, 2017 style. We'd essentially would need two signings(besides the obvious new CB), somebody like Locatelli and another winger to make it work fully.
Tek
Danilo - De Ligt - Chiellini - Alex Sandro
Arthur - Locatelli(and Rabiot)
Kulusevski/Cuadrado - Dybala - Chiesa/new winger
Ronaldo/Morata/(new signing)
Arthur and Locatelli would be two great sitting midfielders, very high technical ability. Would remind me of the Pjanic and Khedira partnership in 2017.
Kulusevski, Cuadrado and Chiesa are perfect wingers for this formation as all 3 have very high work rate which is needed in this formation.
Juventus road to CL final 2017:
Buffon
Alves - Bonucci - Chiellini - Alex Sandro
Pjanic - Khedira
Cuadrado - Dybala - Mandzukic
Higuain
Loved that team, I think it was so complete. Hopefully we'll try to emulate it with Allegri.