Very nice. I particularly like the characterizations--the way that
both Harry and Lily are disconcerted by the "untraditional" coven;
Hermione; etc. And I like the way that you've systematized things that
(I suspect) were just throwaway details in earlier stories.

Unfortunately, although this leaves a clear starting-point for the
next story (should you choose to write one), it doesn't seem to leave
any obvious loose ends. I say "unfortunately" because my appetite for
this universe is far from satisfied.

I really do want to see Ron and Harry as members of the Green Lord
Coven at some point in the future. Ron at least, and Harry as an
affiliate member, or whatever. And really Hermione deserves a more
in-depth involvement at some point--more than just a source of idle
friction. (Is there some kind of bizarre four-way sexual tension among
Harry, Ron, Susan, and Hermione?)

Anyway. Looking forward to whatever you turn your pen to next.