I hate this stuff showing up in the media.
This idea that he needs pace around him is just an admission that he can't play in a high line and be trusted in 1v1s. Its sad, really.
I understand Maguire's perspective. To some extent its like the whole 'unlock Pogba' discussion. If United wanted to play a high line the club should not have signed Maguire. Once we signed him, if we still wanted to go in that direction, we needed to get a Konate or an Upamecano who could run like the wind and cover for his mistakes. I can see how he might feel that the club spent £80m on him but isn't playing him in a system or a way that suits his strenghts.
However, from the perspective of the club, from the perspective of a fan, I would argue that the upside of playing to Maguire's strengths isn't big enough to warrant doing it. Maguire doesn't offer such a big benefit at his best that its worth benching Martinez or shifting to a low block just to keep him in the team.
The truth is we should never have signed him. Its not his fault we did and nobody can blame him for taking the chance to play for Man Utd. However, when you look at how Liverpool constructed Klopp's defence to allow him to play pressing football, its obvious pace is essential to the style of football we want to play. Maguire doesn't have it, never has had it and never will have it.