But Wan-Bissaka does have poor positioning. He directly caused both goals against Sevilla, the first one with his opponent getting in behind him and the second by not playing the space in front him him and clearing the ball. His positioning is weak in comparison to Shaw who regularly clears balls at the back post and defends the 6 yard area superbly.
He doesn't. FBs get caught at back post, not always but few times. Shaw did it too and Shaw was also ripped apart by fecking Pepe, before that I think it was Navas or some city player when Shaw just couldn't get near him.
Shaw is obviously better player than AWB but the hype has been unreal since he was injured. You guys make it sound as if he is prime Maldini + Nesta rolled into one. Shaw also let the players run past him few times, doesn't mean his positioning is poor, it means they are humans and they won't be perfect all the time. If that's the case, all games will end up with 0-0. Players making runs behind the defense, especially from wide areas is very common. Also this is very tough position to defend too as usually the player make the runs from blind side of defender, one of the reason why FBs gets caught near far post.
Check West Ham game when Jose was manager (Which we lost 3-1) first goal was exactly what you described and that was at Shaw's end. The game where Chelsea scored in the last min to make it 2-2, there was 2 Chelsea players infrot of De Gea and Shaw was way behind them.
ManCity game where we lost 3-1, first goal Shaw lost his marker at far post. Then check the goals vs Wolves in the FA cup when Jota (or someone) just bullied Shaw to score winning goal or how Huddersfield scored 1-1.
All these mistakes happen, doesn't mean Shaw has poor positioning or he is poor defender, he is one of the best defensive FBs in the league.
I agree with your post that AWB's positioning isn't as good as Shaw's, doesn't mean AWB's positioning is poor.