Oh look, now the world has been destroyed because the JLA needed Oracle, but Barbara never became Oracle. She's either retired from heroing or prowling the rooftops of Gotham (Hopefully as Batwoman,not -girl by then).
Yes, that's just it. There were other, better, ways to show that the world was ultimately better off with Barbara having been forced to become Oracle even at a personal cost to her. bluefall actually wrote a good fic to that effect a while back.