I'm going to remember this story for how loosely planned and veering it is, sweet moments in a distant second. The jumpiness in the reality switches may be the epitome of exploratory style writing without the writer having steady attention or confidence to keep multiple plates spinning. Loose plans blur into new loose plans. That's not always an issue but it does not mesh well with stakes, and it gets glaring with magic systems since they let fresher or inattentive authors handwave anything.
I got confused over how Lilith just happened to look a bit like Lillian's childhood, not adulthood who was drawn later, but the Lils are no more connected or deep than any other secondary characters. Whether there was something there or it was creative repetition, I shouldn't have expected something. Nothing is very important here, why should coincidences be.
There's enough quality for near a hundred chapters, sure, but I really hope the creators started planning more for any future works.