So I refuse to believe that disc sucks right now so I've been trying some things out. What works pretty good now is to use disc as only a instant hot and shield healer in pvp. I run renew glyph, innersanctum glyph, and power word shield. I only use inner will as our mana sucks right now. And basically you end up being able to spam shields and renews and prayer of mending, the speed boost from will keeps you moving. Never stop moving. And you end up being a druid for the most part that's the best way I see disc right is to set urself up for instant spells and lots of running around. Granted I am not a ranked player but just by changing up to this setup I have seen my survivability and all around performance increase.
Try it out lemme know what ya think.
PS not power word shield glyph I meant to say penence glyph.