Including her is almost like including a completly new character:
- She has no established relation ship with any of the other Batgirls (or really any Batfamily member out side of Kate).
- She was allready pre Flashpoint in a wired place continuity wise, and now it is probably even messier
I also don't think she really adds much to the team, since there is imo a lot of overlap with Steph.
And due to the fact that she is about the same age as Dick (and there for Barbara) but on the other side probably way less experienced and trained than Cass and Steph, I don't really see what role shr should have on the team.