Yeah I think the majority are watching it for Z
I'd watch it even if she wasn't in it, but her being in it is such a huge plus. I honestly don't know if the focus is on drugs, but I feel like it's a big part? Because Z is playing a drug addict. But then again, we might see a lot of other things in the show, who knows.
I feel like it might kind of center around her? Or at least that's what we're feeling like.. from what we've seen in the trailer.