I think Mourinho is going to be very likely to leave the team now. He seems ready for an offer from PSG already as it has been on the news for a long time. PSG must have been thinking of replacing Galtier after this poor season already and Mourinho is surely among the best candidates for the job. Mourinho's style is a little more different from the managers they have had so far though. But I think Mourinho would also feel the need of adapting to the environment a little.
In the end we shouldn't see Mourinho parking the bus easily with a squad like this one in hand.

No matter Roma won the Europa League title or not I was going to expect him to leave. Because taking the helm at PSG must be much more attracting to him instead of staying with Roma. He can do the things in his mind easier there.
I really like Mourinho and I think he is a very great coach.
at this time this news is still a rumor and there is no certainty, if it is true then AS Roma is a team that is very unfortunate if coach Jose Mourinho stays because since Mourinho's arrival to Rome very many changes have occurred in this team.
the AS Roma team is in the process of getting much better, in the last 2 seasons their performance has increased and if Mourinho trains Roma a little longer I think they will be able to do a lot better.
I really hope Mourinho stays in Rome.