First of all our midfield is stacked, and we'll NEVER use a 2 man CM partnership to make room for teenage wingers or half decent players who are being shoe horned on to the wing, that's just fucking not going to happen. It would take a retarded coach to take our best area and weaken it so we can play Coman and Pereyra AND drop one of Tevez/Llorente. Not happening.
Second of all, Allegri has never ever used anything remotely close to a 3-4-2-1, hell only Napoli from recent memory pulled it off with any success, because their attack was stacked and their CMs were average at best.
So I don't want to read more shit about some crap 3-4-2-1 when we have 1,000 midfielders and our best winger is a teenager.
As for 4-2-3-1, come back when we have a top class AM and 2 top class wingers. Otherwise we'll be fielding some disgusting monstrosity with half a team full of players who are half decent in a 4-2-3-1 system, we'd be lucky to finish top 3 with our current team in a 4-2-3-1
I ask again, who marks the sidebacks on you're 4312??
The 2 players behind the CF aren't wingers, because their primary job is not to cross, they're second strikers (SS) and their primary job is to cut inside to give key passes or to score, SS is the best position for Tevez, Berardi, Pereyra and Coman.
Yes we have a lot of midfielders and with 4321 we'd be fielding Vidal, Pogba, Asamoah and Pereyra, 4 midfielders with Marchisio for bench and Pirlo when needed and for your information he's currently injured.
So without the players currently injured our best formation would be this:
------------Buffon
--Caceres--Bonucci--Ogbonna
Lich----Vidal------Pogba----Asamoah
------Tevez-------Pereyra
------------Llorente