I thought the part about Grindelwald was very interesting as well, and it amazes me how she comes up with the characters’ names.
Did you find the link to her interview with the guy who started leaky cauldron? It is really worth reading if you don’t mind a few hints about which way the book may be heading. Also there is a link to the characters sorted by the hogwart’s houses. There are a few characters whose names do not have links so they must be being introduced in the 7th book.
Oooo...I didn’t see that, but I will go back and check it out!