I agree Juventus has not been playing well lately because they do not have much motivation and are focusing on another big game against Atalanta. They already know they will be playing in Champions League next season so they might be feeling bit too comfortable. This has made them play less intensely and with less energy. Coach has also change players around to prepare for other game which has affected how well team works together. This is clear from their close win against Salernitana team that will be relegated. This shows that Juventus is struggling right now.
Looking at Juventus' recent game which seems like Juventus is winning, it cannot be denied that Juventus' game has indeed declined. Seeing what happened to Juventus has made Allegri quite annoyed in several matches, indeed Juventus will be in the Copa Italia Final against Atalanta, if Juventus continues playing like this there is no chance for him to win the Copa Italia, how do we know Atalanta is currently playing very well, they are also in the European Finals.
With last night's incident Juventus were held to a draw by a team that has been confirmed to be relegated from Serie A, this proves that Juventus' quality has indeed declined, if you want to focus on the Copa Italia Final, this is nonsense, even Atalanta can get rid of fourth place Juventus, with this I think Allegri Juventus must make changes to be able to give their best in the Serie A league and Copa Italia later.