I agree. It really fleshed out the girls more, especially Lilith of course, and to a lesser extent Becca. I always liked Lilith from the beginning, her bad attitude toward the MC was clearly mostly an act due to her difficult upbringing and abandonment by her biological father. Any decent father, such as the MC, will give his step-daughter the space she needs to deal with it, and just show that he will be there for her no matter what. I am surprised by the few here that don't see this. Perhaps they don't have kids themselves, or just lack empathy.
I didn't love the scenes with Justin, but I could live with it. But the rest of the story was really well written and thought out. I hope most of it ends up in Single Again, as it would be a shame to leave it out. It is quite interesting to see the story from the perspective of another character, Lilith in this case. I wish more developers would do this.