The abuse that Lilac and Poe suffered felt unresolved to me, the father mentioned intentionally giving them a poor childhood in hopes they will create great art in the future, but would that mean subjecting them to sexual abuse?! They were clearly messed up kids when we see them in present time.
Also, the murder or suicide of the mother. I feel this is intentioned left unresolved though, but I don’t see the point of even creating the ambiguity though. I’m possibly reading too much into it.