Arians was a big reason that Ben developed into the type of QB that he is today, I give BA credit for that. Arians became entirely too predictable and ready to pass all the time rather than run consistently. He talked about Mendenhall being the work horse but Mendy wasn't up for the challenge, the OL couldn't stay healthy enough to block anyone so rather than use more Redman to try and balance things out he'd stick with a strategy that didn't work.
Haley had something going in the first half of the year but the offense couldn't close out games. The defense couldn't do jack either during that time. Haley isn't going anywhere, Tomlin isn't going to can TH this season. The Rooney's won't let him and he wouldn't put himself in that situation of admitting defeat after just 1 year.