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.
Actually, his arrival was quite good. He will add to the strength of the midfielders. I think if Man United's midfielder area is good, their defense will also get better. Because if they are able to take possession of the ball and continue to attack, of course, the pressure on their defensive area will be rare. So there is actually a midfielder and defender attacking relationship. Just saying Maguire is not the best solution at the moment. Indeed, the audience's expectations may be very high because the price of maguire is quite expensive.