Him as DM is Phil Jones as DM all over again. Do not want. Let him compete for the CB spot and hopefully his legs arent shaky when he finally gets to play.
I actually think it would be quite different.
Jones' main benefit in his midfield run was randomly running the ball up the pitch on a dribble and getting involved in some moments around the goal. His passing was so-so, fine for a CB playing a midfield role. Defensively? He could compete with players but didnt exactly have the positioning of Carrick or the ball winning of Ndidi
I could see Lindelof adapting to be a decent holding midfielder passing the ball, occasionally finding a nice pass into front players like Matic and Fred do. But I'm not convinced he'd hold his position defensively in front of the defence well because he likes to retreat and try to track players as a CB. So I'm not sure he'd do that well confronting players and closing them down so they dont get space, rather he might continue to back off. And if that changed and he's less reluctant to engage in DM, why wouldnt it change at CB?
So yeah. I think Jones was fine defensively in midfield but not brilliant, surprisingly had some good moments going forward and joining play
While I expect Lindelof would be a bit weak defensively, but comfortable on the ball and playing a decent passing game