Hehe, glad you liked that line. I could almost hear Snape saying it in my head.
I don't think Snape will repent, or feel sorry for his namesake. I think he's fond enough of Harry, and determined that a great potions talent not go to waste, that he'd persist in 'teaching his lesson' to the very end. So, yeah, my version. :)
Thanks so much for reading, and for your thoughtful comment.