depends, if you play carnage tanking or dps is very dumb easy mode i honestly laugh a bit when people bash casters for being overly easy when carnage conq is way easier or polearm guard too for that matter.
but both sword and shield guard and brute conq are very fun and need lots of attention to continuously watch shields, especialy brute conq i find it rather refreshing to need to swap weapons all the time for bloodbath and throat slash while dual wielding and then swap back to one handed.
but dps on both brute and juggernaut guard isnt way high as dt's are even on normal mitigation bosses dps diference can be as high as 1200.
for example saddur fight on my guard avernal
http://s13.postimg.org/h1fpqjabb/saddur.jpg
had agro like first minute of fight then dt's krovac and dearg overwhelmingly toke over agro dps diference is quite distinct between my guard doing 898dps and the dts doing 1600.
recently managed to do 1000 dps on guard stance swaping but despite doing more dps on that fight i actualy struggle abit to have agro vs dt, first minute or so i have it fine after that only way i can grab it if goading wich obviously ill only use as last resort if agro holder gets very low.
http://postimg.org/image/6t2zhw7bh/
should be obvious that one dt krovac doing 2k dpos and the other dt doing 2.1k dps might have interfered slightly on my puny 1000dps on guard.
its just overpowered in relation to guard/conq agro in some fights, but mostly is overpowered by boss design, in most fights i dont bitch or complain about agro when im on guard or conq.