Overall, Juventus played well but was not satisfactory, because they experienced something unexpected at the end of the season, namely they lost consistency so they didn't look good. However, with their success in the Champions League next season it is still something good for them. Even if they don't lose consistency, maybe now they can still compete with Inter Milan, because initially they had a fairly close point gap with Inter Milan.
I think Allegri still deserves to be given the opportunity to manage Juventus next season, because overall they are not bad. Maybe there is still a lot to improve, and they can do that in this season's break. Allegri has done the best he can, but things like this are not easy to predict where the club will experience a decline in performance. Next season they can improve this and prepare as well as possible to be able to play better than this season to be able to fight for the Scudetto title next season.
Whether Allegri can coach Juventus next season could be decided today. The match in the final between Atalanta Bergamo and Juventus Turin has started in the Coppa Italia. The game will be played in Rom at the Stadio Olimpico and if you look at the current series of the last 10 games of both teams, Bergamo is much better. Juventus have not won in 6 games, an there was 5 draws. Bergamo have won 6 of their last 7 games and drawn one. So the current situation should be better for Bergamo. But I hope Juventus win and win a title this season, they have a great team and I hope they play in the champions league again next season.