In the earlier betas, pure Vitality was the way to go because of so many skills/abilities that directly scaled from max health pool.

Since phase 4 some of them (like the cross-class Second Wind) have been scaled back to be either flat amounts or scaling off damage. I don't think there's a set answer to the warrior stats question, and you'll likely get different recommendations from everyone, but personally I've been going a 50/50 mix of Strength/Vitality. Strength IS useful to a Warrior, your damage isnt insignificant and some of your healing (bloodbath/second wind) now scales from it. I think a mix, or a heavier strength weighting, is the better option than pure Vit now.

Don't put any points in Dex though. You can't block, so you only get half the benefit compared to Gladiator, and currently all napkin math and tests have said the mitigation gain on parry for 1 point of Dex is barely noticable.