I mean, Scholar isn't consistent in terms of a theme (it's appeared something all of three times outside of XIV, and is different in each of them), Dark Knight is an example of that, and Samurai doesn't have that all the time either, so it's not something new for XIV. Cyan, literally the Samurai right after its introduction, doesn't use it. So I'm not sure quite what points you were hoping to make. Dark Knight should have sacrificial attacks, and it very easily could, the other two aren't remotely as uniform as you're treating them like. If you knew FF better you'd know that.