What a wonderful trilogy of AU endings! My only difficulty lies in the convoluted, multiple claused sentences. Several whole paragraphs are just one long sentence!
Perhaps I've been a journalist far too long.

I'm glad you did not neglect Harry; it's been all about Harry since before he was born. A lovely story of reconciliation between those two victims of the Dark Lord.

Very insightful the interpretation of that sentence of the book whose importance always seems to be underestimated.
It would explain why Harry, when hidden under the invisible cloak, is often misled and never catches the true meaning of what he sees.
You have done well to dedicate the last part of your trilogy to Harry who, together with Snape, are the heroes of this long adventure.
I really hope that Harry can realize the truth about Snape in a similar way to your vision, and why not, that he can learn, right by him, even a bit more about the reason of DD’s trust and the events of the past. The passage from angry and hate to understanding, shame and empathy is very touching.
Very good having included Fawkes that could play an important role.
I share your expectation in a second chance to a better life for Snape and so I think that the end of your story is really convincing and touching.

I do love these stories of yours!

I especially like how you described Snape's way of speaking - it's economical but tells us a lot about his mood at that point.

Clever use of canon quotes to start. Here's hoping that JK sees it our way and that phrases like "deeply horrible" were pure smokescreen.