Hel didn't become Batgirl (Batman, actually, hilariously, which is why I consider Cass the actual Batgirl II) until a little while into NML, and this takes place right before the bridges blow, so she hadn't started doing the Bat thing yet.
Interesting thought on Bruce, though - that might help explain why Babs knew where to send the guy, because while her knowing Huntress would be there is impossible, her knowing where Bruce is makes a lot of sense.
I've always been fond of that moment near the end where Harvey and Helena have stopped fighting and are wondering if there's anything they can do to save him.
Definitely agreed. I'd never even have thought of having the two of them interact, but it works really well.