first, ask yourself what's wrong with the originals. also remember that if you choose to go back and redo previous pages, you might get stuck in a vicious cycle and never actually get much done. some of the best webcomics i follow ("dash academy" by sorcerushorserus and "the chosen four" by darrow) started out really bad...at least, when it came to the artwork. especially "the chosen four." christ. anyway, in the end it's up to you but if it's something you're still actively workin' on to this day, i'd say it's not worth it. if it's somethin' ya stopped working on a while back ago, though, it can work either way.