Malfoy Manor was my fav chapter in the story... anyway I guess it is open to interpretation- Draco I felt wanted to help the trio but couldnt- would put his family and himself in danger...then we see the Fiendfyre- where he is all evil again- it's kind of like his dark side outmatches his good side-remember what Sirius said- we all have dark and light inside of us- it is the side we choose to act on. Harry good, Draco bad. At the end maybe Draco does realize what he has done is wrong.