The part that we fans don't know is, how much of 2AMs regression was because of the lack of play makers at WR. It's possible that it was a major part of it. Frost implied during the season that a part of the problem was WRs not being where they were supposed to be or running the wrong routs. He then replaced that coach after the season.
I think that's pretty telling. If Lubick is as good of coach as some think, this can be huge for this offense.