although this has been discussed previously. I can't recall seeing the stat you mentioned on this blog before (really the only M site I regularly visit) but I am as sure as I can be without the stats in front of me that our awful offense contributed to our merely very bad defense. Another stat I'd like to see was the offense' average time of possession relative to the opponent, which is another factor that would definitely hamper a defense.
As to this year, yes, the offense will be better, and the defense may/will benefit (rapidly knocking on wood).
EDIT: I can't ever recall seeing so many diaries so rapidly posted on this blog as in the last couple of weeks. Must be a point thing.