I don't understand this obsession with formations/positions. Ronaldo and Messi spent at least half of their careers on the wings but only on paper. What matters is actually the style of play, what players are allowed to do and who they play with.
Look, we're not doing too well so I'd opt for picking up the best players and the formation will form itself just like the 352 under Conte or 4312 under Allegri.
I mean, you could call it 433/4321/4312 but it doesn't matter. The starting 11 picks up by itself :
Buffon
Dani Alves - Bonucci - X - Alex Sandro
Pjanic - Marchisio - Lemina
Cuadrado - Dybala
Higuain
You could make it a 4312 with Dybala as AM and Cuadrado as SS or the other way around; you could also make it a 433 with both of them going inside or down the lines - it doesn't matter. The details are up to Allegri, he has to make it balanced. You can even line up this squad into 352 - just drop Alves for a CB and then Cuadrado and Alex Sandro are wingbacks.
Either way Cuadrado should be a starter IMO, even if Dybala comes back because he offers so much and is actually in very good form.
For the midfield I picked up Lemina because he's the most well-rounded midfielder who covers a lot of ground, and has a lot of tackles. He would bring up the intensity of our midfield which naturally drops because of Pjanic. Just take a look at his best days at Roma - played next to De Rossi and Nainggolan/Strootman - physical midfielders who allowed him to breathe. Khedira is very good on the ball but without it he's far from that. In an Ideal world we'd have Vidal there to play next to Pjanic or at least Allan. Lemina fits the bill as well but he needs to keep improving.
It's all about fielding the best players you have and correctly interpreting the game. Both seem to be random, mostly due to injuries and so many games to play, so Allegri is only thinking about collecting the most points he can. Quality wise we're kind of short in midfield and on the wings, so there's also a lot of work to be done for Marotta.