These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alternate Character Interpretation: Severus Snape, McGonagall, Dumbledore, Harry's sense of Heroism, Percy's love for his family, etc...In fact 90% of the characters got a new interpretation by this fic. Not that this is a bad thing and is very well done, barely changing the core personalities from the book.
Fridge Horror: The fact that the older witches teach the younger girls how to perform a castrating curse as a rite of passage. Makes you wonder how many times it's used on poor, unsuspecting boys or why the girls need to use it?
Genius Bonus: Apparently Pansy Parkinson's family includes the Borgias.