Seeing things as a writer...

You know what would have really improved Harry Potter and the Half-Blood Prince for me?

( Um, don't read the rest of this if you still fear spoilers for that book. )

So I wonder if, as the title says, I've thought of this solution now (instead of a time when I'm actually reading the book, for example) because I'm thinking about the story from the perspective of a writer, as opposed to a reader.