Yes. I hadn't put it into words yet, but I was thinking something along those lines, that Harry needs to stand alone now.

That and the Snape/Draco thing. I'm leaning more and more toward the Snape-is-a-good-guy theories, and I suspect that they are vaguely hovering around the truth.

Also, it makes the whole thing more real. Not that it wasn't real after the death of Sirius, but losing Dumbledore takes it up a notch.