I think he has something like 43+16 in 15 games or so... It's hard to say if that is good or not (though the next best scorer on the team has 36 points). Anyway, Nyholm just seems to be scoring for U16 team.
I'd guess that he is still playing for IFK Lepplax because he is only 15 year old. You don't really have to chance team earlier than that if you don't want to. For next season he probably has to move some where, the club just doesn't seem to have teams in older juniors.