For those unaware of the Star Wars VP/WP system, how does it work?
Each character gets Wound Points equal to Con. Then each character gets Vitality Points equal to their normal D&D Hit Points. Vitality Points are "missed me" Hit Points; only Wound Points represent serious physical damage.
Vitality Points "heal" quickly; Wound Points don't. Notice how this gets around the need for plentiful magical healing. Vitality Points are also used to power Force powers in Star Wars.
Critical Hits, instead of doing extra damage, do damage straight to Wound Points. I suppose this goes from "threatening" to "downright lethal" at higher levels, once the monsters dole out more than 10 points of damage per hit (since Con doesn't progress much, if at all, while Hit Points continue to increase significantly).