You know its very light on Vampirism in my opinion.
I mean there is the "I can't date because he's going to start asking questions why I stay 40 forever." aspect that Jane worries about and whether its possible for her to tell people that she is a vampire.
But really the vampirism is just a conceit I think to get Jane Austen into the modern age of the cult of Jane Austen.
Its there and its prevalent throughout the book but I view the book far more as a "Jane Austen faces the modern age where no one actually cares about *her* anymore" book than a "Jane Austen is a VAMPIRE" book
In conclusion its far more chicklit snark than vampire fiction. (IMO)
And even if its too vampiric for you I think based on something you typed that you'd enjoy it regardless