We'll see in November!
These are the same problems that have "plagued" the Steelers for years. I agree with you on Arians' putrid play calling but I have to disagree big-time with the lack of discipline. Cowher was a coach who would berate a player for a mistake in front of his team and on national television, Tomlin does so behind closed doors. I'm sure guys got yelled at after the game on Sunday for scuffles and personal fouls and such, just because Tomlin doesn't grab them by the collar and spit in their face does not mean he doesn't let them have it. As far as the turnovers go, that's the most non-composed I've ever seen Tomlin, you could literally see him take off his headset and mouth expletives after the fifth I believe, and he's a coach who prides himself on being calm and collected.
I'm not sure how you could call their 2010 season "lucky", aside from the Bills receiver dropping the OT TD pass which would have won them the game, nothing struck me as lucky, especially not starting without Ben for 4 games. And as I recall, despite the Packers exposing the Steelers flaws and causing multiple turn overs, the Steelers were still only one drive away from winning the SB.
I agree this might be a "down" year for the Steelers, but I heard an interesting fact yesterday; the last time the Steelers lost this badly in a season opener, they went on to the Superbowl that season. They eventually lost

o) but it's still something to remain optimistic about, the season is nowhere close to over.