It's great to hear that you found the Snidget and how he got on with Snape _fun_: that's just what we were trying for with their relationship. It's even more of a kick to know that the heartbreaking nuances came through as well.
The transformation was an interesting challenge to write: it's a bit of a gamble, depicting mental confusion in a POV character, since it runs the risk of confusing the storyline in turn. And you're right, we couldn't resist Arthurian echoes in the confrontation scene - after all, who's more of a stone-hard character than Snape?
Thank you very much for letting us know how you felt!