Well, the RPG was designed to come from the books, so in any case of doubt, I'd be more inclined to lean towards the books. Just my point of view, though. And I don't think you saw my point about that one quote; I can't see it as actually doing something different in that one encounter, just being described differently, coming to the same thing (i.e., it doesn't so much remove the abilities as hinder them, just like an arc light in your opponent's vision effectively "strips away" their agility and reflexes without actually removing them).