"Rowling says that she should have put Hermione and Harry together in the Harry Potter series instead of Hermione and Ron.
“I wrote the Hermione/Ron relationship as a form of wish fulfillment,” she says. “That’s how it was conceived, really. For reasons that have very little to do with literature and far more to do with me clinging to the plot as I first imagined it, Hermione ended up with Ron.”
“I know, I’m sorry,” she continued, “I can hear the rage and fury it might cause some fans, but if I’m absolutely honest, distance has given me perspective on that. It was a choice I made for very personal reasons, not for reasons of credibility. Am I breaking people’s hearts by saying this? I hope not.”
I wouldn't say Harry/Hermione are the ideal couple, but they did have rather more chemistry and a better personality match than either Harry/Ginny or Hermione/Ron, so...fine with me! Going to be fun to watch fandom go completely insane for a little while.
In any case: What a book means to the reader is what it means to the reader, and nothing can change that. And she's not revising and reissuing the books, so it's not Lucas levels of messing with stuff. I find it interesting to hear what the author thinks of the series with her hindsight, but we can all go right on shipping whoever we like--Hermione/Snape, Luna/Harry, anything at all. Tolkien never admitted Frodo and Sam were in love, but I'll always know it's so.