Fury can do well with BiS, i currently have a 3v3 team. Me being arms, friend fury and a healer. The fury warrior pushes out a lot more damage than me, however the debuffs and tools arms warrior brings to the table is quite significant.
If you are running bgs, arms survivability is higher with Second wind. Ability to kill healers should be easier as well.
Definitely do not arm a shield as fury unless u are swapping to defensive stance to go against a melee or a quick spell reflect.
Arms your AP will drop compared to fury.
Only a warrior chooses pacifism; others are condemned to it.