I'm a little bit behind, but I just read the first Batgirl story arc and it is pretty lame.
No surprises, character development in the same way of an 90's Image comic and art is ok, but I was expecting more for DC bringing back the original Batgirl to the mainstream. It should have been in the same way as Marvel brought back Ms. Marvel. Here, it is as if Barbara may have not grown up from her years as Oracle. I used to loved her as Batgirl, but as Oracle I saw her becoming an independent very clever brilliant woman and then all of the sudden she comes back reckless and quite silly at some scenes. It made miss Cassandra & Stephanie for a moment.
I'm catching up now with Court of Owls and Detective, but I'm very tempted to get "Batman: Earth One" and "Death of the Family" now.
BTW, I loved the X-Men cover joke