Cataclysm DK Changes.

[Raxiel]

I got a question about Necrotic and Festering Strike. I'm not in the beta so I can't test these new abilities, what I'm wondering is if they are good attacks for a DK tank, Necrotic Strike seems good for tank for the damage absorption, but I'm not sure for festering strike, the damage seems nice, but is is better than the usual attacks DK tanks use in their rotation.
Maybe someone has a vid showing the abilities, or someone from beta could tell me more about them.

Thanks

[Against the Modern World]

Necrotic absorbs heals on target. So, until "Negative health" from it won't be healed, no heals will reach the target.
It's mostly a pvp skill.

[mordale]

one is a heal block and the other fits into the new unholy rotation.