Even Claudio Ranieri admitted it, he has tried to implement his strategy and change the game in the second-half time. But, there is a lot of work to do and to fix in the club. He is aware of that and it will not be easy to change it so quickly in his game.
Source: Claudio Ranieri
He had very limited time to change Roma before this big match with Napoli. It would be easier for Ranieri if the opponent is not Napoli, which leads Serie A in recent weeks and since the season beginning already shown their good performances.Source: Claudio Ranieri
Ranieri can help Roma to improve, get more points in coming matches when he and Roma players understand each other better. This win helps Napoli to secure their first position, but with only 1 point more than four clubs behind, Atalanta, Inter Milan, Fiorentina and Lazio. At the sixth position, Juventus has 25 points, and they are only 4 points behind Napoli. Serie A top positions are very close with each other and the league looks every interesting for Scudetto competition.
Most importantly, he hasn't even seen the winter transfer break yet, lets see what he is willing to do or even Roma is willing to do. If they can get some good players then we could see them get better. At the very worst case scenario, they will just stay at Serie A, not going to relegate and they are not going to end up with any European competition next season and just try again all over.