Roma managed to beat Lazio in the Roman derby and if Juve now fails to beat Fiorentina tomorrow evening in the away match it will be painful for the Turin people.
in the last 10 games they have lost 16 points from Roma, a big change on the bench for them, firing Mourinho and hiring De Rossi have completely changed their season.
In fact, sending Mourinho off the team was a big risk because he was a very experienced coach. He won the conference league and made Rome a finalist in the European league. That's why Roma made a risky choice and appointed De Rossi as the head of the team. It seems that this change was appropriate and Rome is doing very well this year.
Mourinho's time has gone and his tactics are over-consumed in my opinion. Of course he can do sometimes well and win something with the team but Roma were not that excellent with him. I find it way better with De Rossi but this has to be confirmed since he was recently appointed relatively.
Roma should try to pick a Champions League spot in the time remaining before the end of the season.
Mourinho was amazing when he was working for Porto or the other teams like Inter Milan but as you already said maybe his tactics are old and that's why they're not working anymore but Mourinho is still the same and he has not changed at all while that's the main problem he has.
After he left Roma, they changed and improved a lot with De Rossi and you saw them win the game against Lazio while it was not easy at all as when De Rossi was hoping to see the game finishing faster because the result could change in a moment.