If we took our chances up front we should have thumped West Brom by 3 or 4 goals, and we wouldn't be here scrutinizing every minor detail of Maguire's defending. We didn't keep clean sheets every week with Vidic and Rio either, yet conceding a goal, or even a chance is another nail in the coffin for Lindelof and Maguire.
I actually think bar the first three games of the season where we were collectively a mess and lacked fitness, our defence has been the most consistent part of the team since Maguire arrived, mainly down to his consistency. Usually, DDG, the back 4 and Fernandes are the only consistent performers in the squad, so not really sure where the hate of Maguire comes from.
Is he worth 80m? Probably not. But our defence has defo improved since he's arrived. We're not as weak from set pieces anymore, and most of the time not taking our chances up front are what cost us.