I'm not saying that Byzantine = Force worship or the Sith Empire. I'm not saying that she probably cut and pasted. And I'm not saying those elements were problems, or that they were unique to the Byzantine Empire.
What I am saying is that someone who has studied the Byzantine Empire in the detail to successfully get their Masters in relation to that subject, should have a damn good background for understanding political chicanery and underhanded methods of manipulation. Which makes applying elements related to such into a fictional story much more likely to be interesting/realistic then someone who has absolutely no knowledge of those matters.
If her background had been Engineering, or Romantic Poetry of the 1800's, I don't think anyone would really expect those to influence her writing a story for a class that is meant to be smart, sneaky, underhanded and involved in the political maneuverings. But Byzantine History, that has a lot of elements that could be used as inspiration.
The Byzantine Empire did all of that in such a matter then even a millenia on , we still recognise the word Byzantine to mean sneaky, underhanded, twisty and complicated. (Okay, at least we do if we speak English, I have no idea if it's carried across like that in other languages)
That does sound like a pretty good attitude to have for Sith Inquisitors.