Yet, he’s predicting those changes will be sweeping in the off-season, and primary among those to leave will be offensive coordinator Bruce Arians.

Link

It's a paid article, so I didn't want to post any more of it, but I'll at least give you the best sentence.  "He" in the quote is Jim Wexell's Steelers insider "The Answer Man" who probably knows what he's talking about. 

Okay, one more sentence, regarding Arians' potential replacement:

“You go out and you find someone Ben has never met. In my opinion, he needs an entirely new dynamic. And after you do that, you call Ben into your office and remind him that he’s not in charge of this organization; you remind him who signs those big checks; you remind him to buy in completely; and you make sure that it’s understood.”

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