Ronaldo is an elite player, the kind you don’t see many times in a lifetime. He is past his peak now though & whilst he’s still putting up good stats the Italian league is much slower than Spain so it’s good for him he left. Juve signed him with the intention of winning the CL. Can he win it again with them in the Autumn of his career?
Ronaldo is unbelievable, he is a blessing to this modern football era, and I feel fortunate to have watched him play, win titles and multiple ballon d'or titles in such an illustrious career. Just like you said, he is no longer as excellent as he was in the past, but his desire to perform everyday for Juventus shows class, and the fact that he is hundred percent a complete sports man.
Juve need the UCL, and it was a nice move going for Ronaldo, but I think they went for him too late, if they probably had gotten him maybe three to four seasons back, when he was still up to speed, maybe he could have pushed them to the title.