Milan was very lucky due to the point reduction that Juventus had to accept. Then Pioli's troops were also able to take advantage of the situation that the Bianconeri were experiencing because their mentality was indeed down. Now for the additional three points, Milan's position has secured its position in the top four of the standings. The last match no longer affected Milan's position, Pioli was quite relieved by such a situation.
Of course this is unusual as Juventus' loss becomes Milan's fortune. I agree Milan might not have deserved to be in the top 4 if Juventus didn't get a point deduction, but this is one of those things that was unexpected after Juventus got a penalty point towards the end of the season.
Milan have the opportunity to try to do better next season in the Champions League after failing in the semi-final derby against Inter. Obviously this is a rare opportunity, but in the end I admit Milan deserved it. Milan is also rumored to be bringing in several new players, I'm certainly curious about who they will sign next season.