So far i'm very pleased with the story. It's something different from the typical stories after DH, with other characters taking the front of the scenes, but the really good thing about it is that slowly the depth of the characters is expressed through their dialogues. I actually don't know if you are even following the Horcruxes story of canon, but I guess it doesn't matter.
Very quick update by the way, which is always nice. It's great so far and really looking forward for the rest.
If you can, try to include more loopholes of the rules that Harry can use, it makes some interesting scenes with the rumours, confrontations with teachers/Dumbledore, surprises for Daphne and generally fun as you have shown so far.