It highlights a lot of situations where he's running backwards towards his own goal, with little support, a situation our defenders constantly find themselves in, and he Is very good at it. He's also really good at anticipating danger, which is why he's always in position to make those acrobatic clearances and blocks - basically the thing Mangala seems to lack.
This would be a really interesting transfer because he'd be able to do the screening/blocking job that Lescott did for Vinny, but he's also got a longstanding partnership with Mangala (and Zaba).
Having him as a first choice CB could be the way to get the best out of Vinny again , and let us see Mangala in the form that made him worth 32m when Vinny is inevitably injured for 1/4 of the season.