Snidget!Harry is completely adorable. I'm imagining an animated marshmallow Peep, all cute and fluffy. I loved Snape's and Harry's nicknames for one another; Featherbrain and Featherless, hee! And I've always loved how Snape's referred to Harry as his 'imp.' That's been a recurring thing in your fics for as long as I can remember, and it's so fitting.
Snazzy idea with Gryffindor's sword, too. I really liked the Arthurian feel to Harry being the only one who might be able to pull it from Snape's back. Really nice touch of magic there. And you guys always top things off with such great visual aids. Your fics are always two treats in one! ♥