I am worried about the balance between the two. They both have their advantages, yet fury seems to be better where it actually counts.
Arms is not as squishy per se without the Enrage debuff but Fury makes more than up for it with it's self-healing. It may benefit more from external healing because of that though. Thanks to Berserker, fury has wayyyy superior mobility, which can be even further improved upon with Bounding Stride. (to the detriment of defense, to be fair) This allows fury warriors to go for the stun talents in tier 2, whereas arms has a tough choice to make: Either be a sitting duck (no Double Time) or loose out on Stormbolt, our only stun and, dare I say best utility spell. Those are the big advantages fury has. Better self-sustain, better mobility, better CC.
Arms is not without its unique perks though, namely Intercept/Pain Train (both on the same Pvp row) and Sharpen Blade. I sadly have not yet seen anyone play with Intercept but I can imagine it should be quite strong. After all, it functions like a low cd Hand of Protection. With the additional requirement of having to stay close to the target, of course. Pain Train offers great burst utility, especially in combination with Anger Management. And last but not least, Sharpen Blade could be quite deadly if it is well timed, I imagine.
So yeah, that's quite some support right there. It may also be a bit gimmick-y though, so I wonder whether it is enough with the strength of fury.