last season he was by far the best righback in the Ligue. Before that he was never anything special. He was always good going forward, but it wasnt until last season where he really improved the defensive side of his game.
Claude Puel(Lyons coach now) has to get the credit for his development, Puel is imho the best Ligue manager in terms of getting the best out of players(see Bodmer, Keita, Makoun and Mirallas).