I personally still think Juventus have had a good squad in the Allegri era, especially when Juventus managed to bring in Vlahovic from Fiorentina and also Milik from Marseille.
Only Vlahovic had good contributions for Juventus while Milik did not and Vlahovic has problems with injury and tactics of Max Allegri in later seasons so his contributions for Juventus dropped season by season.
But unfortunately, Allegri failed to make Juventus better, and also the case that befell Juventus might make him also fail to focus on improving Juventus performance in his coaching era. Because anyway, when Vlahovic and Milik were successfully obtained by Juventus, at least many observers also predicted that Juventus would be able to get the Scudetto at that time.
The scandal and -10 points deduction chaos is a big disadvantage for Juventus and it's really hard to maintain good mentality that can help player performances and plans of the coach. I don't defend Allegri but I think it's simply fact and that scandal affects Juventus performance a lot two seasons ago. In the last season, Juventus had good opportunity to win Scudetto because they only played in Serie A, no Champions League or Europa League, so did not win it means a serious failure with Allegri and Juventus.
But anyway, what happened Juventus still failed and entered the next season Juventus also managed to appoint Thiago Motta to be the head coach of Juventus. Of course, with Thiago Motta's success in making Bologna have good results last season will be a great hope that Thiago Motta will also succeed in making Juventus back into a team that has dominance in Serie A. Because after all, basically Juventus already has players with great potential and thus, it should not be difficult for Thiago Motta to make Juventus better.
Bologna is a small club while Juventus is a big club, a most successful club in Serie A. Thiago Motta successfully built up a good and competitive team in Bologna with limited budget and he did it within only 2 seasons. That success brought him to Juventus where he will face with bigger challenge as this is a biggest coach position he takes so far.
Thiago Motta has a successful player career through which he worked with many great coaches and possibly he learned many helpful management things from these coaches like Mourinho, Prandelli to Ancelotti. His success in Boglona proved it and I hope Thiago will continue this path in Juventus.