I never read HPMOR, so I don’t know if this is a fan-fiction or a fan-fan-fiction. I started expecting to be bored really fast, but I read to the end without noticing. I’ll probably read the new ones.
If I understood it right, it’s a fan-fan-fiction that takes place in the start of the new year after the events of hpmor.
“fan-fan-fiction” seems wrong, that just denotes a fan of a fanfic (or perhaps a fic written by a fan of a fan).
I’m tempted to say fanficfic instead, since it’s a fic of a fanfic.
But really, fanficfanfic seems most accurate if you’re going to do something like that.
So might as well just go with “recursive fanfic” or “metafic” or something like that.