Yes, just a suggestion!
You are right about the Dilbert comic. It conveys an idea and doesn't pretend to be 'art'. More is expected from graphic novels, as you know better than I. I think if you are still thinking about the idea from years ago it's worth letting it percolate, playing with pencils on blank paper, doodling, and seeing what happens. Nothing to lose, no pressure, no expectations, find out if it's still something you'd like to do!