Milan have signed Massimiliano Allegri. After 11 years, Allegri will coach Milan again. He won a championship back then. Then he had a very successful period at Juventus. Now he's going back to Milan. I think it could be a salvation for Milan, which has been bad lately. Milan will not play in the European cups next season. By focusing only on Serie A, maybe they will be more successful. It's also important how much budget they will allocate for transfers. Allegri will want new players but the budget may be more limited.
He is one of the best coaches in Italy, I have no doubt that he will be successful. The only thing is that the team needs a transfer budget and if they don't get it they won't have another successful season. They finished this season with a very bad ranking, if they could win a few more games things would be different.
They conceded too many goals compared to their opponents, if you concede more than 35 goals you don't have the opportunity to play in Europe. I think they need to strengthen the defense of the team, I'm sure they will focus on that