Morrison and Burnham have admitted to having to avoid some things/characters being at the fore, but that all the neglected elements and characters "still exist" as far as they're concerned, even if they won't be prominent on-panel. They also both said that, optimally, you can read straight through from volume one to volume two without it seeming as if there's been a huge shift, which I think, so far at least, has been true.
lol those two things being Cass and Steph. Even Morrison has tried to inovolve and use them in this new run and the constant story is no goes its so disheartening. Like "uh Batgirl was a blonde and now she's not what's going on here?". I'll assume Babs was the one who infiltrated the school instead now?