My mortality is light when the Dark Jedi whips out 13-24 damage PER HIT on 2-3 good solid smacks (even at 9th level, thats 1/3 or 1/4 of my vitality per hit). I've gone toe-to-toe with a combatant that has taken me from full vitality to wound in one round and made me run like a scared child. With a Crit, it just means he cuts to the chase and downs me in a hit as opposed to several.
Again: It doesn't matter if I'm 1st or 30th level, my defense is 19 or 90, or my vitality is 1 or 1,000. If my DM rolls two descent numbers in a row and boom, Jedi-go-nite-nite.
And no a crit =/= death. However, a crit = a dang good chance you will be. At best, it means you'll have some time to read through the mainbook while your friends continue the fight.
Again, I'm not aganst lethality, PC death, or even getting knocked into negatives. I'm against how easy V/WP makes all of the above and how my DM's lucky die roll makes me a specator instead of an active element in many of the "epic" combats that dot the game. In a sense, the game DOES mirror the movies, I'm watching it all unfold rather than being able to DO something about it.