I still think he's a weird signing from all sides.
He's coming in to back up a CB who doesn't miss games and whilst he could break through in midfield, he's got Simons and Zambrano to get past. I still think we'll bring in 2 more CBs if Macca also leaves.
I get that it's a body and someone with utility but I don't get why Man City would send him here to get limited minutes when he could be going back into L1 and playing weekly for a promotion-hunting side. He's only played something like 8 games at CB, so I'm sure they'd be keen for him to get some proper experience in his natural position.
I don't think he's coming in as a back-up anything, I think he's coming here to play.