When I think of any CB it's easy to see their strengths.
Maguire - Very good header of the ball and he is good at carrying the ball forward. Strong physically too.
Smalling - Very good header of the ball and he is good defensively. Very strong physically and he has good pace.
Bailly - He has excellent pace, strength, good ground defending, aggressive but he is very injury prone which means he won't get run of games.
Lindelof - No idea. He isn't strong, poor in the air, he isn't aggressive, very passive. It's not as if his ball playing skills are like Blind's to accommodate him. With benefit of hindsight, Ole got this one very wrong. Smalling has made mistakes too at Roma but IMO he would be better than Lindelof for us.