Mists of Pandaria - Blizzcon 2011 - Talents - Deathknight in depth

So the new talents would bring more choice... less forms of cookiecutter builds/choises
I've decided to take a closer look (from pve perspective) to the Death Knight ones and try form an opinion about the given choices per tier.

All Talents can be found in this post.

Deadknight Talent Choises

Tier 1

Deadknight Talents Preview: Tier 1 

Blood Boil: could be nice, some extra damage while spreading your diseases, this only useful in aoe situations though.
Corpse Explosion: It requires first a mob to die with diseases before it has any use? Doesn't seem all that useful in aoe situations you mostly already have your diseases spread and the Blood Boil seems much more usefull then?
Outbreak: This one is actually useful in single target situations (most pve bosses). I assume that it works like it does now. I think this one is the most useful one for raiding?

Tier 2

Deadknight Talents Preview: Tier 2

Some defensive abilities to choose from

Lichborne: Seems to be mostly for pvp, if you can switch out as easily as they claim it might be useful on fights where the boss has some fear.
Anti-Magic Zone: A damage reduction for the raid. Could definitively be useful in some situations with heavy raid damage.
Bone shield: If there is some random damage, but no heavy stuff on the raid. This one could be my default.

Tier 3

Deadknight Talents Preview: Tier 3

This seems mostly to be a pvp tier
Death's Advance: Only against someone that is trying to get away from you but it does require you to have used 2 unholy runes so they must have been in range before.
Chillbains: 3 second immobilize and 50 slow on frost fever. Does seem nice
Asphyxiate: I don't really understand how this one works, Does this last till cancelled? Then you can stun someone forever?

Tier 4

Deadknight Talents Preview: Tier 4

Self healing abilities
Death Pact: Nice strong heal but rather long cooldown.
Death Siphon: Deals some damage and heals for 75% of the damage. I think this one is nice to use next to Deathstrike, also doesn't seem to require a rune. I think this will be my choose. Seems most useful while soloing stuff.
Vampiric Blood: Seems tanking talent.

Tier 5

Deadknight Talents Preview: Tier 5

Increased rune regeneration options
Blood Tap: Requires you to actively click the spell. 1 minute cooldown seems long as well. Will build up easily though.
Runic Empowerment: 45% to randomly activate a rune, seems a lot more useful than Blood Tap if it occurs more than once a minute.
Runic Corruption: 100% faster regeneration for 3 seconds after Frost Strike, Rune Strike or Death Coil.
As it is now i do use Frost Strike a lot so this one will be very intresting aswell.

In the end I think will be Runic Empowerment or Runic Corruption will regen the fastest your runes and one will be the cookiecutter choice.

Tier 6

Deadknight Talents Preview: Tier 6

Aoe damage options
Gorefiend's Grasp: Aoe damage and pulling enemies close. Seems like maybe an aoe taunt for tanks?
Remorseless Winter: Aoe damage, I think this one will do more damage.
Desecrated Ground: Aoe damage and immune to CC. Seems more of a pvp ability.

Also in this tier one of the 3 will do the most damage and in pve raid situations there will be a cookiecutters choise