Yeah but the logic there is he's not playing vs Barca so might as well give sharpness to Shaw as a CB and Malacia at LB? So I don't see it as dropped, more just getting the starters for the next game sharpness. Only Varane rested/dropped. Leeds' game plan was let Varane play out from the back as Varane is safe on the ball and doesn't try much... Can't do the same vs Maguire, for all his faults, he is much more adventurous in his passing.
It's not surprising at all that the game before Martinez is suspended, Shaw comes back at LCB and Malacia at LB. So for me it's really just Varane and Casemiro to come in the next game, and there are pretty clear reasons why those 2 don't play today.