Any complex combination or arrangement of fleurons or other type ornament is not really possible with any contemporary word processor for one good reason: type is not set by hand anymore. Precise but free placement of glyphs is tedious if not impossible. It would require a whole new paradigm of setting type, one that would be based on modularity and strict typographic measurement system. A digital letterpress system if you will. The closest we've had that digitally was probably textmode and ASCII art.