it's just like any administration ... the 'head' has to be somewhat able to do the job ... but the real work is done by the administration under 'him' ... that's why head coaches hire assistants, offensive/defensive coordinators, etc...
Les, from what I understand, is slowly backing away from making decisions during the game, and letting his coordinators (Crowton and Pelini) do their jobs ... Hopefully, in short order, Les will become no more than a figure head for the team, while the real mad scientists under him do their work ... (grin)
