Well let's see
A) Cassandra Cain quit being Batgirl
B) Shiva quit being a villain
C) Cassandra turned into a Teen Titan villain, heading up the League of Assassins for no apparent reason
D) Shiva and Black Canary are "Trading Places," again for no good reason.
To sum up
----> Batgirl and Lady Shiva from "A Knight Alone" to "Destruction's Daughter," -- A+
----> Batgirl and Lady Shiva from "World War" to "One Year Later," -- Crap.