I have seen some footage of WoD (posted on MMO - Champion) and would like to share some Death Knight changes. (Mostly Blood). Remember, it's still in production, so don't get too worried.
Death Strike (Blood Only)
Now deals 196% Weapon Damage. From 259%.
Heals you 30% of the damage received in the last 5 seconds from non - player sources of at least 5% of your maximum health.
Would heal about 2% in PvP instead of 3% (like it is now).
Horn of Winter
No change, as much as I can see. But it seems to have NO CD. Just a global CD. (Not sure if it still generates Runic Power).
Same as before, except now does 155% Weapon Damage. From 200%.
Now does 75% Weapon Damage. From 100%
No longer heals. Instead placed an absorb which scales with Attack Power AND Vengeance.
Dancing Rune Weapon
= Have no change at the moment.
Not sure how people would feel this as a PvE standpoint but for people who play as Blood, it will be harder to survive and you will be doing quite a lot less damage.
(Was taken as level 90).
(Do not forget in WoD, every time you level up, one of your abilities will get a permanent buff).