Unlike most people, I don’t mind NB but he doesn’t fit on the current canvas. I have a feeling that he was supposed to be part of this teen scene but he looks a little younger than his actual age so the age gap looks like more than 2 years. In that one scene that he shared with Joss where she was asking for his advice, she looked like his babysitter rather than a friend. Although EM usually looks older than 16 to me so that probably doesn’t help. Honestly I think she looks older than the 20 something actresses who are currently on the show most of the time.
Unless they are trying to keep him around for when the next group of kids are SORASed, I don’t see the point since all he has right now is this “fued” with Valentin.