He’s looking very promising. The big test will be to see how he copes against the hoof it high into the box teams, whether his positioning and anticipation can make up for being a little shorter than most CBs.
He will not develop any further as 4th choice CB and would just stagnate here in that circumstance. It would serve him better to go out on loan to League 1/Championship, and it has been suggested that there is interest.