You know, one thing about that entire sequence that delights me is that Dumbledore's last true moral student "lesson" is to Draco, and only secondarily to Harry (who is frozen and can only watch). It just reinforced to me that Draco's choices and his SL is as important as Harry's, and that their fates are closely intertwined.

Could not agree more. I'm always pointing this out-dude, Dumbledore's DEATH SCENE is dedicated to THIS. How could it not be important? The main lesson Harry is even getting there is just how important it is. He's seeing for himself how it works, not just being told to be nice to people morally inferior to you.