Scal is valuable to this team because of his versatility. He can defend several positions (depending on matchups), and while he does not bring a lot to the table, he doesn't take much off either. You can count on him rotating correctly, making the right passes (that ugly inbounds pass notwithstanding), and generally being where he is supposed to be.
However, if you are counting on him to be anything more than a 12th man, who can step in if there are injuries or foul trouble, then you are asking for trouble.