The long answer here is that I feel like myths and fairy tales have a different atmosphere about them and the fairy tale side of things suit Lacie best at this age. A grown Lacie who had had some time away from her canon to accept that she had a chance to live after all might eventually become a goddess figure, but this version is a child, and part of her arc would be reclaiming the idea that when she doesn't have a connection to the Abyss she can be anything she wants. She has a lot to learn, and Baba Yaga stories are very much teaching tales.

The short answer is that as a practicing witch I am really not keen on tossing that particular name around in casual online funtimes.