I dunno, doesn't seem that controversial
1) That video was amazing. Thank you.
2) I pretty much agree with you. This definitely seems par for the course as far as Larian humor is concerned. While a dark and brooding librarian would certainly have been cool, I suspect that the slightly humorous version will be considerably more memorable and stick in my head.
It is certainly weird that the skeleton is not wearing a mask (she's clearly intended to be in hiding in the concept art), but maybe she shows up a couple of places and keeps trying to buy all our books. That would be quite endearing.