I don’t think you can really replace Grav for Endo; they’re not rely alike with how they play but both definitely have their qualities. There have however been a number of occasions this season when Grav has been struggling and it would have been better to play him with Endo to save Grav being overrun and to stop the midfield being so open.
He did start a few in the CL and played well. There was 1 PL game he was poor after coming back from an injury but I think we’re always going to look better when a player is regularly playing in their own position and we’re not bringing in the likes of Quansah and Jones to cover.
Is it really that weird when he is a right back playing at right back and we’re not having to rely on somebody else to cover for him when he’s injured? I could be wrong but we don’t seem to concede many when Bradley plays at right back either.