Love it and it would be poetic to see Dudley's daughter and Rose neck and neck for head girl.
Especially after she graduates and can defend herself.
While some people see the dementor episode and DH scenes turning 'D" around I don't see it. The three biggest bullies in my elementry school all did time. One is doing infinity (life) one finished seven years and is trying to turn around and the last is awaiting a date with a needle.
It takes a really big kick in the nads to turn someone around and with all the negatives in his life I don't see that happening for 'D'. To many years as the selfish bully.