I'm not considering Casemiro's ability with only goals and assists. I'm just pointing out that with the arrival of Casemiro, many people are thinking that Manchester United's overall gameplay will change. I do not agree with this idea. Casemiro's arrival will definitely strengthen Manchester United's midfield. But their poor defense will not change. At the same time, until Ronaldo returns to form, United's forwards will also be weak and will struggle to score.
Agree with what you said. The arrival of Casemiro might increase the strength of MU but that doesn't mean it can immediately make their gameplay better than before because indeed this cannot be determined by just one player entering because when it comes to gameplay, it is quite clear that this is related to the club's scheme and playing strategy and one player comes will not be able to change that if the other 10 are still playing monotonous.