Identity Crisis?

I've read everything I can get my hands on concerning Mike Tomlin since he became the new head coach. I was excited every time I read about his defensive philosophy. Schemes don't matter, just crush people seems to be his mantra. He likes to dominate on defense, create pressure, attack...intimidate - all Steeler characteristics. So why talk about an identity crisis? Because new offensive coordinator Bruce Arians just dropped this quote which scares me:

"When you think of the Colts, you think of a finesse offense, but when they came down the stretch in the [2006] playoffs, they had 100 to 150 yards rushing in every game," Arians said. "It's just a different style. You don't have to line up with two tight ends and two backs to run the football. Rushing yards are rushing yards."

He likes 4 wides and he doesn't care what down it is. I would hate to get away from the power running game. It's an attitude that gets instilled in your linemen and gets stronger throughout the course of the game. I agree that 3 and 4 wides would create a lot of space for Willie Parker, but I don't think our O Linemen can gain the attitude by only power running when they feel it's necessary. I hope Arians "gets" that and doesn't try to fit square pegs into round holes.