This seems really nice but i have some points: Why not make the characteristic stats (speed,strength,balance) be relationated to a class (tackler,dasher)? Are the stats Control, Concentration, Confidence, Commitment the variants of HP/status? Are you focusing more on simulating or making a game?
Good point, and your right, we haven't quite worked that out yet, but essentially there will a type of class system based on stats that indicates function and is displayed in game somehow.
The four C's you mention are just a concept at the moment, I was playing around with a way to quantify a players current psychology and how it can affect in game performance. Kind of like some kind of power system you need to manage thats driving a player. Its probably too convoluted to work, but who knows, that part of the game is pre-prototype.