It's difficult to explain just how much better Arizona's offense has been this year. After being historically awful on that side of the ball last year, the Cardinals have been a slightly above average unit in Kliff Kingsbury's first year. That explanation really doesn't do justice to just how dramatic the improvement has been. It has been absolutely night and day according to the eye test and DVOA.
With the compliments out of the way, last Sunday vs. the Rams the offense looked awful. Not historically terrible like they did all last year, but just your run-of-the-mill bad NFL offense.