The organization's bigest failure over the past 8 or so years has been not finding a successor to Brees. In 2017, we perhaps were one pick away from drafting Mahomes at 11--Kansas moved way up the board in its trade with Buffalo to select Mahomes. In 2018, many thought we were going to pick Lamar Jackson when we surrendered two number-one picks to move up to 14 in our trade with Green Bay. We instead picked Davenport--and had we not made the trade, we could have picked Jackson in our original spot.
Statistically, drafting a top quarterback in the fourth-round is a serious longshot. Regarding Book, I have seen enough. On Book, I have to disagree with Dan. I think his ceiling is bottom-half backup quarterback. And the probability is high that he will never reach that ceiling. His physical attributes do not justify keeping him any longer.