I think you've redeemed canon a little bit with this. You've given the war, the events and the deaths of DH, the thoughtful treatment that it all deserves. The way you've examined the gradual process of grieving, healing, and rebuilding here is wonderful.
I was riveted by the descriptions of the funerals, the work on the castle, and the beginning of new traditions. That the growth of the relationship between Harry and Charlie parallels all of this is absolutely brilliant. The pacing and the passage of time throughout this story are perfect, and this is some of the most fantastic slow build of UST I've seen