There's a chance I'm wrong, but I think Ravens is talking about Darth Bane, not Cad.
And, yeah, I think that should be fixed. First off, he's a Conquest character, they're already a pain to get DURING Conquest, to say nothing about afterwards. Second, he is one of the most (in)famous figures in the Star Wars galaxy; the guy came up with the Rule of Two because he was smart enough to notice what was holding the Sith back, and because of that he allowed those after him to grow and find new ways of defeating the Jedi, especially by using the Jedi's own beliefs and flaws against them. In other words, he himself had the FORESIGHT to come up with a new and formidable philosophy to better take down his enemies.