Kean should go. We finally have a nice setup of attackers.
Vlahovic or Milik then Chiesa or Yildiz. You need one of the attackers to offer that individuall quality to create thing on their own. For me it's all about balance, Milik-Vlahovic or even Milik/Vlahovic- Kean was/is not a good solution. Yildiz with Milik/Vlahovic makes more sense.
Chiesa is great but he still has some issues with not being fit for some games. It would be nice to see Vlahovic with Chiesa and Yildiz on the field but I am not sure Allegri will make that happen, maby if we need a goal the last 20 min of a game.