AC Milan With its current coach, Sergio Conceição, it is not as good as you have said that the appearance at the beginning of the season was not so good and like a wind in the game, it was also not good in giving tactics, even though it has players like Gimenez, Felix, and Walker, if it is not handled properly, then the results we can see for ourselves AC Milan, they are still stuck in 8th position in the standings and their last two defeats were really disappointing, of course there must be a revision in the squad and management that is so lacking in paying attention to the shortcomings in AC Milan's playing style this season.
He was hired to help AC Milan but weeks ago, he had a conflict with AC Milan captain player Calabria on the pitch and in front of many cameras. I could be wrong at that time, but I felt it is not a good signal for his management in AC Milan and for the club performance too. It seems my feeling is right as AC Milan was not improved after weeks with Sergio Conceição and they are falling down in form and soon in rank too.In the end Milan fell because they didn't care about the depth of their squad, they were superior but couldn't maintain it until the end. Here we can judge that Bologna had more chances of shots than Milan which were completely minimal. So until now Milan has never made me sure to bet on their matches every week. For me Bologna is much better, much more effective in attacking and clearly far above Milan in terms of tactics. 
It's not too late for AC Milan to wake up and get a position in top six, but top four is already far enough for them. They will need to wake up, play nearly perfect and get almost maximum points in last matches, and needs mass luckiness to get a fourth position. If no super big surprise happens with AC Milan and clubs above them, they will not get a fourth position in this season.