Marvelous character voices all round. The rich details of post-battle, from Tonks' hair in death to Mrs. Creevey's unusual perception, all added weight to the reality of grief and loss. The separate funerals for Lupin and Tonks seemed another element of the wizarding world viewing him as not quite one of them. I liked Harry's pondering that Remus would be happy to be with James and Sirius, with Lily of lesser importance to him. And Harry's observation about Teddy dreaming with his coloring following his baby thoughts was lovely. I think it's particularly difficult to craft Charlie's character amid a lot of canon elements, since we see so little of him in the books. Here, he felt like a perfect fit among the Weasleys (with a nice nod to timeline linking him with Tonks' generation), as well as someone who needed to be a bit apart from his large family.
The dense world of characters woven in each other's lives really touched me. I cried, I smiled, and the author definitely fulfilled the request for desperation and canon compliance, but not fluffiness or AU.