Just added the option to logged-in ("authenticated") users to see an edit or new draft link at the top of event pages. This should let you update the page as needed (directly) rather than submitting a duplicate event or using the [+] Feedback system or email/Twitter/whatever. When you click save, I'll be notified and I can publlish your updates.
You don't even need to be the event director or original author to update the information--how 'bout them apples?
Thanks for visiting,