theirs this piece in the book understanding comics by Scott Mccloud
where he shows an artist and writers both wanting to make a great comic book, but the artist thinks he needs to draw like a master be as good as Leonard or Rembrandt to convey the message of the writing, while the writer thinks she has to write like a scholar and be a master at describing the scene with all the best words possible for the artist to not get lost, this makes them end up separated since, on the writers side she has beautiful narration and descriptions that take away from the art and at the artist side the art is so emotional, impactful and beautiful that it takes away from the dialog and story.
just like LV said
beautiful,emotional and descriptive art is great but it exist in service of the story,
and the expressive and emotional narration in writing is perfect for a book but in a comic you need to make it so it doesn't take away from the art or the story.
they are both tools to convey the story and should be treated as such one can absolutely overshadow the other but it shouldn't overshadow the story or the message that it wishes to convey
speed in web-comics is the new and third aspect that Scott couldn't explain (since they weren't a thing back then) in web-comics your consuming a page at a time and we need to make sure that the reader doesn't have to reread our comics(loading times are horrible unless you compress the page for it to be like only 2 mb =/) just cause we take to much time making our comic, this makes the reader leave our comics and wait until we get more pages, or worst until we finish it, and then they forget us which is the death sentence for web comics XC
we all need to find a balance, personal balance for our comic, between these three aspects if we ever want to make a, relatively, successful web-comic.