Before he arrived at Roma Paulo Dybala was an already established phenomenal attacker jus that he wasn't at his best in his final season at Juventus which is why many believes it was Jose Mourinho who helped the Argentine to be back to his best.
That being said, the player still has the independent privileged to determine his future at wether to continue playing for Roma or consider a move to another club. The summer transfer window is still very much open and anything can happen before the last day of the transfer window
As there is still independent privilege with Paulo Dybala, he should be able to make the right decision for himself at this time before the transfer window closes because next season he will also have to do better by being in a more right team, even though he won't either. it would be wrong if he had to return to stay at AS Roma next season because Roma is also not a bad team for him with almost 30 years of age.
I think staying at AS Roma is also a good choice, it is possible for a player to always be in the strongest club to increase their chances of winning the competition, but lately Dybala seems to have lost his best game, he still plays well, but not like what he can show in the past, there is a difference that is quite visible in my eyes.
He became one of the mainstays at AS Roma, and Jose also believed in his abilities, as evidenced after he was brought in from Juventus he made a contribution, although not optimal, but it was still within good limits.
18 goals in all competitions in his first season is a good record, and he has the potential to do more than that.
Oh yes I don't mean to say that Juventus is one of the causes of his decline, but indeed the last few seasons his decline has been very noticeable while at Juventus.