Sadly, there's no way to edit Head Coaches which is probably the last major thing that I wish Finn could add to his editor. Oh well.
As for playbooks, I dont even bother with that crap because the team's depth chart itself stays the same and that's what determines the team's offensive, defensive and overall rating.
I wish there were ways to switch depth charts from 4-3 to the 3-4 and vice versa. I also hate it that I cant delete a formation. It's stupid that the Ravens and Chargers have a "bear" formation when they are 3-4 teams in the game. Uggghhh.