Ah, interesting point. That's certainly true in the Pottermore bio (and definitely helps make the argument that canon Tonks is not weak or moping). In Kaleidoscope, though, Remus's distance is actually a recent Development

I believe it reflects rather well on my ambivalence toward the whole bio-thing that I in a way pick and choose what to take to heart of the bio and what to ignore ;)

I forgot to mention Dumbledore in my comment. I like what you've done here. I often feel that fics written post DH tend to be unreasonably harsh on Dumbledore - his role was certainly not one to envy - but it makes total sense that Tonks feels angry here. Remus as well, even if he rationalizes his feelings away.