Severely overrated in my opinion. Very good young defender with obvious potential to be one of the best around but Jones and Smalling to name just two players looked similarly promising at similar ages when we (a big club) snapped them up. Playing at the top level is a totally different beast and for me, Stones is more likely to take a Smalling development trajectory if he moves than a Shaw for example. All of a sudden his mistakes will be magnified and pressure will be on his back.