Jake defined the spectrum of visualization from Blueprint, which would incorporate storyboards and occupy time, to Essays, consisting of illustrations, which are more dependent on the text they accompany.
The text of any particular story must carry a portion of the storytelling burden, Jake recommended choosing wisely where to put the majority of the burden. Of the utmost importance, stressed by Jake, was getting your story across. If you must rely on visuals to communicate this, then do so, don't be afraid to commit to communicative imagery.
Then I had to leave and you all got a lot more information than I did. Jerks.