Finally done with this--had to watch it one episode per week, as this series was painful to watch because the lead character was highly unlikable, and tended to drag all the show's supporting characters down with her. The conflict here was more personal, but Jessica really made a lot of stupid decisions that cost the lives of innocents around her.
There are actually 3 Marvel super-heroes here: aside from Jessica Jones and Luke Cage, there's also Trish "Patsy" Walker, who is Hellcat in the comics and was a long-time member of The Defenders, which was one of the comics that I used to read until it was cancelled a long time ago. Trish Walker was the one bright spot in this depressing series, and I'm really hoping they include her in the upcoming Defenders series.