I really enjoyed the prequel to this story, and you've got this one off to a good start. I like Snape -- you've got him at a good happy medium, considering all the factors going on... not a huge bastard, but not a total wimp either. All the workings of the Wizarding World are fascinating too, and I'd really like to see where you go with them. And of course the subtle battles with Albus are fun! ;) Do you intend to continue this universe at all? Either way, it's been a very interesting read :)