actually, I prefer to look at this from the CONTEXT of a TEAM.
yes, the defense needs to create more turnovers. and yes, our offense needs to become more efficient in short-yardage and red zone situations. if we can improve in both of these areas our team will be improved, which is all I'm really concerned about.
either way, Bruce Arians' play calling was predictable and inefficient in the red zone and the Steelers made the right decision to replace him. whether Todd Haley was the right man to replace Arians remains to be seen, but that doesn't change the fact that Arians needed to go.