I have to admit, I've always been a Ron/Hermione shipper, so I was very happy in end when they ended up together. But, after this movie, especially the dance scene, I could definitely see a Harry/Hermione relationship. As well as the scene worked, I almost wish they could have found a way to tone down the romantic undertones to the scenes with just the two of them. For those of us who know who she ends up with it's aggravating to see those two looking so good together when they are supposed to be with the Ron and Ginny.
I agree to a certain extent. As a filmmaker, the chemistry between Daniel and Emma is amazing. You really can't create that kind of stuff, so I can understand that they want to use that chemistry. I like Harry and Hermione together, but I don't ship (Their relationship reminds me of a relationship, I'm currently having).
That being said, I will constantly defend the dance. I generally hate Harry in the books. He has tunnel vision and really only cares about himself and/or the mission. Ron and Hermione are constantly sacrificing for him, yet we never see little things like him getting Ron and Hermione gifts for birthday and christmas. Even the small scene of comfort like after she saw Ron and Lavender, which wasn't in the book. And the hug, when he saw Ron and Hermione are okay.
And the dance... he knew that Hermione liked Ron, even though the words were never exchanged between the two. He knew that she wasn't here so much for the goal, but to protect him and she let the man she loved walk out alone, because she needed to be there for Harry. Harry danced with Hermione for some sense of normalcy in their lives. For that short song, they were teenagers. Two best friends enjoying each other in a way that they have seldom gotten the chance to. If you look at it like that, it was beautiful.
Anyways, IMO, it works well in my mind from a storytelling standpoint and from a filmmaking standpoint. I mean, you really don't come by the kind of chemistry that Dan and Emma have together and as filmmakers, I doubt they want to waste that. There's a good chance David Yates won't get that lucky again.