If you're the Admin or StoryAdmin of a site, you will always get the Admin's version if the story editor. You don't need to use all those features if you don't want to - just select a title, a topic, and type in your story in the "Intro text" field, that's all you need to do.
Or you could hack submit.php and remove the redirect to the Admin's story editor from there:
After that, even the (Story)Admin will get the simple story submission form.
bye, Dirk