Funny. Call me odd, though, but I actually like the notion of having some "skills" hidden. Aggressiveness is one of them that makes things a little more interesting. I even think there should be some hidden random factors that affect game performance, perhaps related to those things that are outside of the game, like a player's personal life. We don't need the details, but just some unpredictability that says that some players just have off nights. Maybe that could be part of a hidden "Focused" stat that makes some players consistent, and other players more likely to play below (and even above) what their skills are.
Don't ask what sort of Chunks they are, you probably don't want to know. Blowing Chunks since Season 4!