Juventus must bring in more reliable players, even though currently the players they have already have reliable talent, but look at Juventus' defense this season, it looks very sad.
I agree with you that in the coming season Juventus has a big target to return to its glory days and all of this must be done in accordance with the club's plan which will build a club better prepared to face obstacles in the Champions League and Serie A.
For example, at the start of this season Juventus appeared impressive but lost consistency at the end of the season.
This is an example that consistency must also be maintained to provide success to the club and Thiago Motta's task is to further study what Juventus needs to return to performing with high consistency.
Bringing in great players is every club's dream but the problem is that Juventus doesn't have enough budget to get these players, so what they do is compete without forcing themselves meaning they understand their abilities. For next season I think the situation will still be the same Juventus is only able to compete for the top 4 or tickets to the Champions League and we don't know how long they will be in this situation.
Juventus still have some good players, what I feel is missing is the ability to manage them properly to achieve the results they want. I know some of the players, Paul Pogba, have not been in their best form, but the have promising young stars like Samuel Iling-Junior, Timothy Weah, Dušan Vlahović and Moise Kean. If these bright stars are properly managed, I'm sure Juve will be able to put up a strong team for the next season. The must not sign some big names to make impact, after all Bayern Leverkusen did a wonderful job last season with no notable big name, just their regular players.