Blizzards supports the idea of health pools imrpoving surviblity alot more than what wotlk offered. Now with factors like masteries, talents and spells that increase damage further and resilience no longer afftecting crit(and who knows what else)how much health do you really think your gonna get.
My warlocks at 27k in pvp gear so if the changes affects 80 than im guessing up to 55k by expansion