@Jodak Honestly, I always preferred providing utility to a raid over my own benefit but as an avid PvPer I had to take Insect Swarm for the extra dot due to the drop-off in damage from rocking a tank spec that sacrificed the traditional damage talents of a pure tank spec.
If I don't end up hitting any of the higher raids come release, it might be worth doing that but this spec worked quite well throughout AQ40 (and up to Rank 11), I only used this build until twin emperors before I switched full heals for progression.
Obviously, the meta has likely changed, as I never played private servers to test what works anymore and I doubt I will play beta to save myself for the big show in August.
The likely spec which you're playing is a nice one, much slowing leveling but the uptime and clutch healing when you hit wPvP due to being in the middle of the pack makes you an utter nightmare to kill, so you'll likely to get left alone in the process till they 3v1. That was my issue first time round because feral and balance were not viable build in the wild west days of early talents.