I've been...well, in between, on this show. Mostly because the creepy dead guy's horrible southern accent. I'm okay with pretty much everything else - even the lead's blandness. The actor is actually pretty good - I haven't seen him in anything at all, but he just can't manage a southern accent. My family's from the south, and I don't typically complain about southern accents. But jeez, this one just bugs me. I wish they hadn't made his character a southerner. It is, for me, the only really off putting thing about this series.
To me it sounds like Cassie's mom might not have been addicted to alcohol so much as she chose to drink too much for a specific purpose - to dull her senses. No less dangerous, but and obviously it killed her, but perhaps it means that Cassie wouldn't have a genetic predisposition to alcoholism, and therefore drinking and working in a bar wouldn't be a problem for her. Or, if she does have addictive behavior, it might be with something completely different.