Even though Chelsea signed Ronaldo, it would not be enough to make Chelsea get better results in the Champions League. It is better for Chelsea to think about other player options that might be able to improve performance for the team and here coach Graham Potter must be tested with his observations in order to get the players that are really needed at Chelsea, otherwise they will find it difficult to adapt to other teams.
Cristiano Ronaldo joining Chelsea wouldn't be too bad. Because Chelsea are in dire need of a superstar at the moment, if Ronaldo joins, he will get more playing opportunities than Manchester United, meaning Chelsea will focus entirely on Ronaldo. Ronaldo's career at Chelsea will be more profitable than signing Ronaldo.
I don't think Ronaldo is the answer to Chelsea's needs. even if Ronaldo will play for Chelsea, I'm not sure he will be able to boost the performance of the Blues. the only move Potter had to take was to improve the mentality of his troops and re-strategize before all Leagues were rolled out again.
Let's see, Ronaldo with his Portugal. the only goal he could create was from the penalty spot. he has entered 37 years of age, his productivity and sharpness have decreased even though his stamina is still fairly prime.
To bring Chelsea to the next round is not easy, at least Potter has to learn a lot from what Tuchel did while still coaching Chelsea. it doesn't matter if he learns from his former Chelsea coach, and works on his weaknesses. at least, the champions league schedule still has a time lag before being rolled out again.
Potter still has plenty of time, even if Chelsea fall short in the champions league. then the target of finishing in the top four of the domestic league is an obligation. otherwise, his fate will be like previous Chelsea coaches.