You don't need the old carnage passive to get increased spell crit. We have CPs for that--or any other altered passive, really. Honestly, racial passives were only supposed to give slight bumps to your character's abilities--not define them. Even if they were "subpar", there are several in-game methods (even prior to the CP system) that could circumvent them. Now with the CP system its even easier to do so without sacrificing gear/glyphs.