For quite some time now I dont see AC Milan as a serious team again, they have lost 8matches with 41 points and at the moment they are on the 8th position in the league standings after As Roma, having played 27 matches so far in the league, the bad performance of AC Milan has persisted so as it is, I don't expect anything from them in that match because they may end up messing up again, ordinarily lecce shouldn't be a problem for AC Milan to win but the recent performance of AC Milan can't be trusted, as a bettor I wouldn't try to risk things by adding AC milan in my bet slip knowing fully well that they are not in a good form, I think AC milan has not come up with a good strategy to solve their current problem, there's no changes at all so I wouldn't want to dash my hope in such encounter because anything can happen, personally I don't think Milan will end this season in top four unless there's improved performance from them if not, things will remain as it is.
You are right and I agree with your thoughts about AC Milan current situation. They have not been playing well lately losing 8 games and only getting 41 points from 27 matches. It is difficult to believe they can win against Lecce even though they should be the better team. If anyone is betting on games it is smart not to choose AC Milan until they start playing better. It is worrying that they don't seem to have plan to fix their problems and it is hard to imagine them finishing in top four unless they make some big changes. It is best to be careful and not get too excited about AC Milan until they can show that they are playing well consistently.