Yup, exactly unlike that!Like how Darth Maul gets cut in half and comes back?
It would have been a nice addition certainly, but even in this context I don't think it would have clarified anything for anyone. It's essentially the same information that was in most of the press/promo copy of the time, with no elaboration on what a Sith even is. It could be interpreted as Vader's species, his homeworld/nationality, a made-up word for "black magic", or any number of possibilities.Yeah, there is a deleted scene were General Tagge references this "Lord of the Sith" which would have been nice to see as it gives more context of Vader's role within the Imperial military at the time.
IIRC, I think the annotated screenplays that came out in the mid to late 90's with snippets of the earlier drafts were the first time any mention of the Sith as an opposing order to the Jedi really got out into the wild, but largely went unnoticed or ignored until TPM's novelization came out ahead of the movie and George got around to lay it all out.