Well, if you haven't noticed that by yourself then there is no need to discuss about him.
But he isn't called Rosinaldo just like that. It's indeed his great technique that made people call him like that

I believe he's among top10 most technical players in serie A and he does have a very good vision. He's fast, he dribbles at full speed, which is very rare in this league.
Do you remember Torino-Milan from earlier this season? That's what everyone expected from him only few years ago. Because he has the talent to be on top but something's wrong in his head. He's not using his talents smartly and consistently and that's why not only that he doesn't develop but he seems frustrated and he plays even worse than he was in the previous years.
I don't think he'll ever be on top and considered one of the best, which is a shame because he certainly has the talent to make it there.