Pretty much this. I played a good but with wounds vitality and I am not convinced of its value. Not every one want gritty danger in their combats.I guess I'm not convinced that it adds much or that there's any significant demand for this. There's never going to be any system that's particularly accurate (whatever that means), I just don't see how breaking up HP into 2 numbers adds much.
But I also don't see it ever happening outside of house rules.