I see these changes as "tweaks" or even "buffs" to pve tanking for Dk and especially for MB'ers using a DK as it will make their damage more smooth and less "spiky". I see them as an all around NERF to Dk's in regular single player pvp. As we never really got to see them perform in the new arena season i am not sure how to say if the pvp nerf's were warrented or not. Hopefully the DK will still be competitive in single player pvp. Perhaps these nerfs where needed to "balance" the class... idk.

The Dk anit-magic spells are two. Anti-magic Shell... which they all get. Anti-magic Shell lasts 5 sec (10 sec with glyph) and reduces all magic damage by 75% while it lasts. It also prevents the application of harmful spells and effects while it lasts. So x5 CL would be hugely reduced by this. 1 min CD. The big magic bubble they put up is an uholy talent called Anti-magic Zone. AMZ reduces all damage to everyone inside it by 75% and lasts for 30 sec or until it has absorbed 200% AP +10000 damage. NOTE: To get AMZ as a talent you must take a pre-talent that gives you a boost to your AMS +25% damage reduction meaning that then the AMS is at 100% damage reduction while it lasts. 2 min CD.