He is good defensively but as Hardwick was right to point out in the presser his attacking work is next to non existent. Quite the old school fullback but the modern game needs him to be more attacking as well.
Might be an idea for Dimma to actually look at a game in total.
The reason why the backs do not offer much offensively is because
A) There are NO strong repeated leads from players upfield (with the exception of Jack) to pass the ball.
B) with the lack of work effort the ball, if not delivered perfectly, will rebound at speed to catch the defender out of position.
Have a look at any game. Most of the run from defence comes from BEHIND the ball holder ie someone running past for handball or short kick or a switch of play. There is NOTHING coming from upfield.