Curious, Could you type out the different /castsequence macros you used for your initial testing? I'd like to look them over, perhaps I can offer some thoughts.

It's sad to see how bad our dps is. People at 70 were hitting numbers similar to your test. The bloodlust issue is something I have been trying to figure out. If you put 3 LB in between the Lava burst cooldown that works great. If you are bloodlust you may need a 4th LB or your Lava cooldown wont be ready. So far I have not come up with a good way to macro it.
2100-2400 dps non-raid buffed at level 70 was only being acheived by rather decked out toons. I'm assuming Kaynin is still largely in quest gear with a few normal instance drops and a few heroic drops. Which actually brings up the question Kaynin, what's your gear look like? Could I see an amory link please?

Edit: Just noticed Kaynin's sig with links to her armories. Basically a mix of quest blues and crafted blues with a instance drop and a couple of level 70 pieces. My point isn't to rag on gear (as it looks fine considering how long wotlk has been out) but to point out that it's still early on in the expac. I'm not saying shaman dps didn't take a hit but this dps range doesnt seem that awful to me. Maybe I'll have a better understanding at 80.