As much as I like Soom’s dolls for their fantasy parts [hooves, claws and wings], I think I might be the only person who thinks that the headsculpts [for me, one of the most, if not the most, important parts of the doll] are uniformly generic and blandly pretty.
I mean, compare Migma’s "hollow head," the one with fangs, to that of, say, B&G Doll’s Burrysa sp, another vampire doll. With childlike, rounded curves and a demurely opened mouth on her headsculpt, Migma with her "hollow head" looks a lot like your average Asian BJD. That is to say, there’s nothing distinctive about her. On the other hand, there is no doll quite like Burrysa, who’s all angles and who has a mouth far more open than any other ABJD I’ve seen, with the exception of AOD’s Fenris.
Of course, I’m also biased because I own a Burrysa and like her very much, and I do not own a Migma. However, this example does illustrate that there’s more than one way to make a vampire ABJD, and Soom chooses the safest way of modifying the headsculpt. I do like Migma; she’s attractive, but she doesn’t have a lot of character in the way she’s presented as a default.