Thanks all for the tips!

I think I'm pretty good on armor - have done quite a bit of AH work, and my iLvL on gear per character is about 100 worn (bit higher on the tank - tank is 14k Armor, 13k hp). I think my rotation may not be set up right and my dps may be too low. I did try Utgarde Keep and I struggle with the 3- and 4-pull groups, and the dragonkins were a real struggle, especially when they come with an add; in BC instances, I could easily tank down even overpulls of 6 or 7 elites, but the 30k+ hp on the elites in Utgarde seems to be past the tipping point - it just takes too long to burn down the enemy. Healing isn't really an issue, I can drop 4x Regrowth, Rejuv, and 2 sets of 2x Tranquility with hotkeys and never miss a beat on healing the bear or even spot heals on the cats. I think it's more a question of dps.

The group parses at about 28k dps now - do you expect I would get significantly better results as boomkin or moonkin?

Thanks again everyoine for the great feedback - and by the way the XP is back to normal (3k a mob on RAF) in Utgarde, so there must be a cap at 70 in BC instances. More feedback and ideas wwelcome and very appreciated!