Gosh have some patience. Clearly the key storyline is a slow burner. They are playing a long game. Building some intrigue. We know that it has something to do with Brian, and since Jean is back in the summer, I'm sure it's about to be revisited. Why is everyone so desperate for everything to happen straight away.
As for this story with Kush, I'm not thrilled at the moment, but we don't know where it's heading. It could all be leading to an explosion of Stacey's loneliness, like she told Sean. She feels alone. This could just be a trigger for something bigger. We don't know.
Let's not start questioning Lacey's own personal choices when we basically know nothing. Stacey's return has been one of the best the show has ever handled, because she's come back and been integrated back into the community so seamlessly and has developed from a character who was exhausted and seeped in sensationalism to a realistic and mature young mother. She may not be fronting a massive blockbuster story right now, but since when was that a sign of a good character? They're playing the long game with Stacey.