Wrong again.
The loss of Kurt Warner and his ability to get rid of the ball in a hurry is the reason we're giving up more sacks. Additionally teams have no reason NOT to blitz; Kurt Warner made people pay for blitzing last year so teams were much more hesitant to blitz all game long. Reggie Wells sucked, and while Faneca hasn't been a great upgrade, I'd contend he has played better this year than Wells did last season. Moving Levi was a was; our LT play last year was just as bad as it is this year, but again the Kurt Warner factor plays apart.
Many "experts" pointed this out last year, that Kurt Warner made our offensive line look better than it was and that without Kurt we'd need the line to play a lot better.
The drop off in production from the running backs is attributable to 1) facing more 7-8 man fronts. Watch the games, you see a lot less nickel and dime defenses than what we faced the past few years. That's obvious. 2) Less overall rushes, since we can't sustain drives, not because we lost the great Reggie Wells LOL.
Ever look at the website Profootballfocus.com that watches every snap of every game and watches every player? Our offensive as a whole were all ranked near the bottom last year. Every single one of them. And their conclusion? Kurt Warner made them look better. It's like comparing the Chicago Bulls with Michael Jordan and Scottie Pippen to the team after they left.