Griese aint that bad of a QB and it would probably be an improvement of last year. Matter of fact, last year it was their defense that lost the game, not the offense (if I remember correctly their offense scored 21 points and their defense allowed 29).
Their D should be better than last year (a few position improvements and more experience) and all their offense needs to do is run and protect the ball, make occasional passes and be able to stretch the field, which griese can do.
But we gotta see how Grossman performs.
Overall, I see da bears a better team than last year.