The plot w/Lumen went through the predictable paces - Dex tries to get her to go home, she tries to go home, she can't - but what happens from now on shouldn't be nearly as predictable. I have no idea where they're going with this, but I'm glad they didn't have Lumen overtly blackmail Dex. Much more interesting if his sympathy for her is part of what's keeping him embroiled with her story.
I really hope Lumen doesn't kill Quinn. I was disappointed in S2 when Lila killed Doakes, because I thought it was far too predictable when they did it the first time around.