Some truths about JK Rowling and upcoming Fantastic Beasts:

FB is about WWII.
It's international. It's going to include non-British cultures.
JKR's record on non-white characters and cultures: shallow tokenism. This is just fact. She is the writer she is. We have evidence. If you want representation, look elsewhere. If you want accountability from popular creators...it doesn't really work that way.
DEFINITELY keep speaking out, educating, reclaiming. DEFINITELY.
But know the writer for who she is and don't be surprised. She's shown us who she is.