I agree with you, Motta is a new coach and needs to study the club in other for him to know the team well. Any players that is brought in will need to time to adapt with the club football pattern. There is a lot of work to be done because Motta needs to bring his own game tactics for the players to blend in and that will take some time. I believe that Juventus from next two seasons will be able to win the trophy.
Based on the duration of the contract that Motta has to coach Juventus, it is clear that he has sufficient time to fix every player who will come into the Juventus team, including old players who will not leave for other teams next season. And as usual, every new coach on a team will try everything to develop their own team's tactics and performance while paying attention to other teams for the same thing. Because Juventus is a big team that cannot afford to be weak at this time, it is more natural for them to rise and win trophies after several seasons of failure.