I find it hard being optimistic with Tomlin as the head coach. I find it even harder when he proves he can't even make a change at the coordinator position out of fear that he'll be completely exposed. However, as miserable as Arians is, we have the 5th best quarterback in the league and he has a 92 QB rating in 8 seasons. We also have pretty good receivers, 2 very good running backs, a solid tight end, and a great defense.
We need only two things for this team to be able to go to the playoffs and allow the team to win in spite of the coaching staff. We need a rebuilt offensive line and a couple changes in personnel on the defensive line and in the secondary.
If this team opens next season with the same offensive line or only one new lineman, as well as the same secondary and defensive lineman, I'll have to root for a complete collapse of the team and hopefully missing the playoffs so that coaching changes might come about for 2013.