I think JK was trying to set up something in the epilouge. Not something to go on for later, but I noticed she didn't explain what the kids looked like, which was something that she always has done. She's always definded the looks of people so that you can invision them in your mind.
She didn't do this, so I think she was just trying to say "Alright, it's your turn to use YOUR imagination world."
At least that's what I got out of it. Plus you have to take into account the amazing amounts of fanfictions circling the web. For years people have been making fanfictions regarding Snape and Lily loving each other, Snape loving Lily, Draco and Harry getting it on (-_-), twincest between Fred and George (If you think I'm kidding go to fanfiction.net).
So I think she was just trying to give us the chance to make up our own story for it. Like I said, at least that's what I've gotten out of it.
I was at opening night too, and I was in the Snape Debate, I was one of three girls who opposed all the rest to as why Snape was innocent. I even had a bet going against 3 of my friends, saying Snape loved Lily, and if I win you owe me $25 if I lose I owe you each the same. They laughed at first.
Then I got the last laugh. Muhahahahahahahahaaaaaa.
Snape is not dead in my mind
Now for some funnys to make me feel better.
This is my way of not having a breakdown because Snape is dead. >_< Noooo!
Link to Funny Pic:
http://fc01.deviantart.com/fs11/f/20...Plane_copy.png