Interesting discussion aong some analysts.

From Football Insiders:

http://www.footballoutsiders.com/scramble/2012/scramble-ball-shrine-inept

Excerpt:

ike: Everyone was worried that Wallace's late return to the team would cause him problems learning the new Todd Haley offense. That wasn't really a problem. The problem is that the Todd Haley offense is really bad. It is as if he imagined the Steelers were some kind of Steelers from the mirror universe, and built it around the strengths of a bearded Troy Polamalu and a Mormon Brett Keisel. Tom: I'm sorry, I thought from time immemorial that the Steelers had a divine right to a super-awesome running game and didn't need to ever throw the ball. Just wanting to run and being the Steelers should be enough on offense, shouldn't it?
Mike: That certainly seems to be the theory! However, Wallace was the best deep threat in football last year. He was phenomenal. The response this year has been a bunch of short crossing routes and generally using him as a possession receiver, which has gone very poorly. partially because the receivers have done a terrible job holding on to the ball. I would single out Wallace, but he's merely the worst of the bunch.
Tom: What this sounds like is the all-too-common problem of round pegs being shoved into square holes because they're the pegs the team has.
Mike: Yes, and considering it's not just Wallace, but really every pass catcher other than Heath Miller, I'm starting to warm to the idea that the players just hate the offense. Considering Mike Tomlin, apropos completely nothing, again reiterated that Ben Roethlisberger was happy with the offense, it's pretty clear that nobody on the team is actually happy with the offense. Because, as you said, it's shoving a lot of round pegs into square holes. The desire to run an offense that protects Roethlisberger is commendable, but it has turned the Steelers into a team with a pathetic offense 75 percent of the game and an elite offense the 25 percent of the game where they absolutely have to score and revert to their old aerial attack. That is a recipe for a lot of close losses.

Tom: With the Steelers deciding to pay Antonio Brown, it seems inevitable that Wallace will go somewhere else as a free agent this offseason. Let's hope whichever team he ends up on chooses to utilize his skills as perhaps the league's best deep threat in a way the Steelers have not this year.
Mike: I actually disagree with that. He is now famous for drops. His price will fall enough that the Steelers can afford him, and I strongly believe after the injury issues and general ineffectiveness that the Steelers will look to restructure Troy Polamalu's mammoth deal this offseason.

 

That's article pretty much nails it. Our offense was basically run, run,hope Ben can convert on 3rd down. It worked to some extent against poor teams, but it's no way to sustain drives. Before people start pointing to our time of possession as some offensive barometer waiting until there's one second left on the play clock will add up quickly. No Ben for 10 games over the last 3 seasons and we're 12-4 under one oc and a sub 500 team under the other. Also in case you haven't been payin attention Haley's offense has carried the ball 50-60 fewer times than under Arians and for a significantly worse average.