casemiro hasn't been great since february

Xhaka has not declined yet. Nothing in my comment suggests that I think every player 30 or over has started to decline.

Prime Xhaka is now innit? He was mediocre for years and was a liability for a red card.

well xhaka also had other issues that caused him to try to do to much thus lose what he was/is good at look not as great.

always liked him even through his bad spell ofc.

didnt help that he was signed when wenger was still there then gone through a few different mangers with different styles.

its prob the same at man u because different managers rate different /want different players or players that they want and not what they have as well.

besides the fact that they are older ofc