I wouldnt change much in this team. We have a great squad. Morata and Pereyra turned out great. Evra can play for one more season rotating with Asa, who will be back in full shape for next season. At the back line, Bonu has improved a lot, we still have Girogio, Barza and Caceres + add here Rugani. We could sell Ogbonna if a decent offer arives, but i dont see it happening.
I like our midfield. If we could keep Pogba, it would be perfect. Id like to see a lot from Pereyra next season too, he seems to improve a lot under Allegri. Same goes for Morata. We dont need another striker, at least not untill Tevez is gone. Fuck Falcao, Dzeko. We could save the money for next season when Tevez is gone and buy a proper replacement. If we do sell Llorente, id bring Zaza.
Id also keep Sturaro and Coman, i can see them doing a Pereyra/Morata next year if given a chance.
If Storari leaves, id get a new second GK. Neto would be great if he is willing to sit on the bench. Id only get a decent RB/RWB to rotare Lich more ofthen. Darmian seems ideal. Attacking midfielder... If there is an oportunity for a great AM, id do it. But if not, im not convinced with Pastore or Vazquez. Better stick with Pereyra, Vidal and Coman as an AMC then getting Vazquez.
So to sum up:
In: Neto (if Storari leaves), Darmian, Rugani, Zaza (if Llorente leaves), a decent AMC (if there is an oportunity, we shouldnt just buy anyone).
Out: Ogbonna (if a solid offer comes), Marrone, DC, Isla, Llorente (same as Ogbonna).
Our main goal this summer should be to keep Pogba and Morata, to add some solid rotation options (Rugani, Darmian, Zaza..) and get rid of the deadwood (Isla, DC, Marrone etc..).