Newcastle United’s defence might look very different right now had Eddie Howe got his summer wish. The Magpies tried desperately to sign another centre-back during the summer transfer window, with Marc Guehi the club’s top target. Paul Mitchell tried to sign Guehi for Newcastle, but was unable to strike a deal with Crystal Palace. That was a real blow, with Guehi lined up to be Fabian Schar’s long-term replacement. However, it is unclear what his role would have been in the short-term. Would he have replaced Schar straight away, or sat on the bench? Alternatively, he could have played alongsid…