Gargoyle and Unholy Blight have swapped talent positions. Gargoyle's damage has increased and runic power cost per time has decreased.
Pestilence – this spell no longer causes damage but just spreads diseases. Blood Boil is intended to be the general area attack, and has been changed to be castable on targets with no diseases on them, but does extra damage if diseases are present.
Unbreakable Armor now absorbs a flat amount of damage that increases as your armor increases. It no longer boosts armor.
The Frost tree has been shuffled. Among other things, PvP talents such as Endless Winter are closer to the top of the tree where Blood and Unholy death knights can access them.
Sudden Doom – this talent now procs a Death Coil rather than requiring an additional button click. It works similarly to shamans' Lightning Overload.
Magic Suppression and Blood of the North have been reduced to 3 ranks for the same benefit.
Blood Gorged now grants armor penetration instead of expertise.
Unholy Blight becoming a 21 point Unholy talent is huge for AOE tanking. Consider this, in one spec you can now have Morbidity, Unholy Blight, and Howling Blast. You kidding me. 5/45/21 will be the new tank spec of choice. You won't have bone shield with it, but the changes to Unbreakable armor will offset that. You will have 18 seconds of IBF and 20 seconds of UA every minute. If its real ugly you can cycle in Lichborne too.
51 point Unholy 2H DPS will become one of the top DPS choices with Gargoyle getting rebuffed.
Blood will be happy with automatic, always criting, death coils. Talk about increasing your DPS or TPS for the blood tanks. Especially since the sudden doom proc will not consume a global cooldown.
With the reduction of Blood of the North and Magic Suppression to 3 points each that will allow a bit more flexibility for deep tree Frost/Unholy specs a bit more flexibility for the good stuff.
The changes to Pestilence and Blood Boil aren't a big surprise. The net damage between the two will probably be fairly similar to what it is now. As it is, you should only be including Pest in your rotation to spread diseases anyway.
Given the changes to the talent trees expect a free respec when this finally hits.
Damn I get excited about AOE tanking the more I think about this. I can see an early rotation being IT, PS, Pest, HB, BB, UB followed by DnD, OB, BB with Frost Strikes dumping the RP. If you can convince your DPS to wait on the first HB you will aggro like mad. Single target will be IT, PS, HB, BSx2 with FS RP dump followed by OB, OB, HB with FS as the RP dump. MMMMMM.
Now if they just throw in Dual Specs as well so we can have a full on DPS spec too we will be gods.