The fatal mistake from Tomlin this year was keeping* Arthur Smith, if it was indeed his call.
Otherwise it’s all above HC levels, getting A-rod, and matching him with a OC with questionable experience, and dropping a dude for some late round picks who was like a top 3 WR of the season
When you think about it Steelers might actually be a mess with respect to offense, on the same levels as other teams that are poorly ran. But they have Tomlin and a bunch of veteran defensemen making it look better than it is