...provided they keep an eye on healers. They've definitely taken a step in the right direction with the (pretty heavy) nerfs to Illumination, Penance and Innervate, but I hope it's enough.
Also, this easily boosts Resilience to the single most important PvP stat. Can't imagine wanting to gem anything else now, that might be a problem...on the other hand, using PvE gear in PvP was even lamer, and that's sure to be a lot less now.