Arians was villified for not being a traditional Steelers OC- no reliance on pounding smash-mouth running games, more finesse, more big-play strikes than time consuming drives.
Ben was getting sacked under Arians, he's getting sacked under Haley.
Wallace was a superstar under Arians, a bum under Haley.
Mendenhall was the 6th best Steelers RB of all time under Arians, we can't generate a running game under Haley.
Now, to be fair, the OL under Haley has been in transition which no doubt makes things difficult, but it's not as if Arians was given an all-pro OL either.
2 different philosophies for the 2 OC's, but it doesn't seem the Steelers have bought into Haley's style yet.
But for all this, Chadman still suspects that the problem doesn't come from Haley, but from the way the popular Arians was removed from the organisation. What was a tight-knit, well functioning team suddenly became a mob of unruley pouters that weren't performing up to their best.