Entirely depends on how the Saints grade the players available at #14. If the orgaization feels Wells will be a better player than anyone they could pick on defense, I would consider that a good move. They should not out think themselves or reach. "All things work together for the greater good.' if you cannot pass the ball 8 man fronts almost deny you the opportunity to run the ball effectively.
So i understand the connection between throwing and passing the ball. However teams that can run the ball effectively in most cases can do on offense anything and i mean anything they want to do to you. It makes things so easy.
That in turn helps the defense. (clock managment, rest, situational circumstances)
Now when you factor in a better game day signal caller in Williams and some depth additions, things could turn around fast.