I'm happy you found so much to like and enjoy in the story; I hoped you would. (And am just sorry you were – and still are – so emphatically not well. Get better!) Thanks for listing the things that particularly pleased you, and for the rec in your journal. I do appreciate a detailed response!
I was happy, also, that you wanted a fic with Sybill. It encouraged me to write this story, whose bunny had been hanging about for a while, and have the chance to show a younger Severus who's learned some things but not grown too bitter yet, and to explore how he and Sybill might interact, and what she might be like under all the silliness that canon limits itself to. I thought about including the Headmaster year in the fic, and exploring what their relationship might be then, but that year is so far from the period that most of the fic covers, I thought it neater just to hint at the future in those two codas. (I can tell myself I may write that year some time, but I probably won't, alas.)