I was thinking about what tied the whole trilogy together and when TV in Black & White leaked the line "troubles come in threes" really stood out to me. Maybe the trilogy is about the main troubles of her life (weaved in with honouring love lost, etc): BTD is about addiction and death; BJ is about K going to prison; VG is about her having to let go of her career ambitions because things weren't going anywhere and "relaxing into a more simple life".
redrose liked a post in a topic by sickmind in LANALYSIS: Relating Songs To Known/Assumed Relationships