<p>I applied early to Georgetown and sent in a decent essay, but I've just written one that all of my teachers agree is much better. If I don't get accepted early, will I be able to substitute the new essay for the old one, or send it as an extra?</p>
<p>Why not check with admissions directly to ask?
These links might be helpful too (though I'd be careful about going overboard.)
College</a> Admissions: Deferral and Waitlists
Deferred</a> Early Decision Applicant Asks for Advice - Ask The Dean</p>