Milan will really need to make a big improvement for next season. Because they didn't play as good as the last champion should have done. They couldn't even enter a title race with Napoli properly. They made so many unnecessary point losses and barely made it to top four. I'm saying "barely" because if it weren't for Juventus' punishment Milan were going to be out of top four.
Therefore Milan will need to learn their lesson from all of this. They did a good job in the Champions League though but they were very ineffective against Inter in the semi finals at the same time. I don't know what they can do there next time but their priority must be to remain in a title race throughout a season.
Milan season was undoubtedly disappointing falling short of what was expected of a defending champion. Their inability to challenge Napoli for the championship exposed a number of flaws that need to be fixed. There is a pressing need for improvement as evidenced by the numerous unnecessary points lost and the narrow escape to a top four finish. Although their performance in the Champions League was admirable their inefficiency versus Inter in the semi finals showed flaws that must be fixed. Milan needs to internalise the knowledge gained from these failures in order to move forward. Their main goal should be to remain in the title chase for the duration of the full season. To reclaim their preeminence in Italian football this will necessitate a thorough examination of their gameplay tactical modifications and probable squad reinforcements.
About reinforcing their squad I think they should start with bringing a much more productive striker to the team and a younger one if possible. Because Zlatan has announced his retirement and Giroud hasn't been that much productive at all. He scored only 13 goals in 33 league games. I don't even want to talk about Origi because he scored only 2 goals in 24 league games.
Maybe in many of them Origi didn't play for 90 minutes but still this can't be an excuse. He couldn't satisfy the expectations I'm afraid. Thinking all of these Milan definitely need a much better striker to make things better in the Serie A next season.