I'm glad you liked the scans. I generally really do love this comic, especially the art, but I disliked this aspect of it, as it seems oblivious to the idea that Barbara could be a real character and a genuine part of the story.
It was a touching scene, the lack of the trailer just disrupts the narrative flow for the story for me. I found it confusing is all, because I don't identify Dick's childhood with a big house, and at first glance I would not have guessed that was him and his parents at all were it not for the Flying Graysons poster.