Uh, Bloodthirst is a builder. You have to spam it. Why am I opening myself up to 30% extra damage taken just for using my standard rotation? Unless there's just some obscene amount of damage as an upside or crazy regen hidden somewhere Fury Warriors would basically be the most vulnerable targets in the game.
https://twitter.com/WarcraftDevs/status/664517318030954496
Correct. Being Enraged reduces your defenses. However, that's offset by a much higher max health, and very high self-healing.
Also https://twitter.com/WarcraftDevs/status/664524346975649792
Fury's artifact is indeed a pair of 2-handed weapons. They looked a little small in the preview; we'll be scaling them up a bit.