IMO, we should always play a 4-man defense. 3-man defense is outdated, now even in Serie A!
We can easily field both Hernanes and Cuadrado. A 4-3-1-2 can easily turn to 4-3-3.
Cuadrado - Marchisio - Pogba
Hernanes
Morata - Dybala
Can also change during game into:
Hernanes - Marchisio - Pogba
Cuadrado - Morata - Dybala
That's the benefit of having a flexible trequartista like Hernanes. Everytime Cuadrado pushes forward on the flank, Hernanes can drop back to cover.
I agree that the 352 is outdated, mainly because the formation doesn't really suit us anymore.
As I see it, Conte deployed the 3-5-2 in order to give Pirlo freedom and protection. I don't he trusted Pirlo enough to let him play in the defensive position as Allegri did last season. In the 3-5-2 With Pirlo the formation became very dynamic due to Pirlo's movement around the pitch and his creative touch. Whenever he was tightly marked and unable to affect the game he often stepped up into more of a trequartista-like role. But, 3-5-2 without a playmaking player like Pirlo in that particular role the formation becomes very predictable and static. This is what was obvious in the last two games as well.
What formation we play we end up with doesn't really matter to me as long as it suits the players we have available. Thereby, preferably not 3-5-2. The 4-3-3 formations with the players you show is very well suited in game against mid table teams and below but in CL and against Roma, Inter, etcetera, I would prefer a bit more balanced approach. Perhaps the same formations but with one more player offering more runs off the ball and taking the necessary defensive work. But that's just my opinion.
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I can't remember the detail of how Camoranesi played when on the side of a diamond.
As I recall it in the early years he mainly positioned himself far out wide when we were attacking to find space to dribble and stretch the opposition. Over time he gradually moved more and more centrally and in the end looked more like an attacking midfielder from central position. Like a classic CM with offensive duties to dribble, flick, pass, and score.