I won't lie, I'm often not sure what Matheson is. The Petry-Matheson trade was a very good one value wise, however Matheson should be trying to reign in the risk at his age and considering what the team is trying to do this year. MSL mentions that he wants to let his players think, but it always seemed to be in the context of offense. I don't think he's referring to Matheson cutting through the middle in his own zone and giving away the slot completely. That's not really a low IQ play, it's a player knowing better but still taking the risk.
A player of Reinbacher's profile would fit this team perfectly right now...