FIRST DRAFT, FIFTH DRAFT - WHY BOTHER REVISING

However amazing your plot, however vital your characters, however seductive your setting, if your story/novel is poorly written it will be rejected.

So  revise, revise and revise again. Is your beginning attention-grabbing? Does your plot meander? Are there long periods of
nothing much happening?
What about superfluous adjectives, adverbs? Over-long descriptions? Telling, not showing?

What about the time scale? Have you allowed sufficient days, months or years for the action to take place?

I could go on forever, but why not make your own checklist? Here's a page from one of my own novels after a first time rewrite -, but not the last.