It's a mixed bag.
Impassable guard is 10 sec of blocking every minute. Against a single target, thats not very impressive. against many targets that used to be UBER impressive, now, its just impressive for AoE melee. However, i think investing less in pally gives you more bang for the buck regarding AoE.
There isnt much more mitigation to be had in pally that i didnt get in my build, with the exception of 3/3 Hardened Will. You could spec heavier in the other trees to get more threat. From what ive read, now that DPS is gearing up, tank threat is becoming a concern. 16 in Warlord give you Intercept and Imposing, both great threat builders, not to mention the 10% armor, 5% dodge, and 5% block chance.
Then of course reaver has a 5% straight reduction in all damage, crest of the abyss stackable armor/spelldmgreduc buff, mitigation from blood fever, and AoE coming out the ***.
Myself, im very concerned with threat because most everyone is better geared than me, and i need as much threat as i can dish out.
Edited, Apr 7th 2011 12:48pm by KTurner