To say it's improved a lot I don't think so, although I don't deny that Jose's arrival brought about a lot of good changes for AS Roma. But even so, they also have to improve their performance again, because they are also now still difficult to compete tightly for the race to become champions.
Jose Mourinho knows very well that this club will not be easy to bring up rapidly and immediately become a major competitor in the race for the scudetto. But I also see them still up and down in performance and cannot be consistent. That's what makes them still difficult to penetrate the competition at the top.
Building a team is not easy and cannot be done in a short time, the arrival of Jose Mourinho made the progress of the Roma team move in a better direction so that now we can see Jose Mourinho building the team slowly even though the results are not yet visible, but the process he is going through is to achieve it all.
I cannot deny that Jose Mourinho has made Roma better and now this team has very positive possibilities and also now the Roma team is more respected by the top teams in Serie A.