Unless you spend alot of money on a monitor and use a DP connection your monitor runs at 60hz, meaning that anything over 60 fps doesn't matter at all. In some cases it's even bad to go higher because you start seeing screen tearing, artifacts, etc...
Do you have any 3rd party add-ins installed? These can have a very detrimental effect on fps.
I've always found wow to be fairly poorly optimised, especially in comparison to games that are far more impressive graphically. Also, fps always seem to drop after an expansion. Fromw
Hat I gather, wow is more cpu intensive than gpu. Do your frames rates improve if you lower resolution? (that will help identify if it's cpu or gpu limited).
You could try taking off the frame rate limiter (something like set maxfps = 200), look it up on Google.
What issues are you having with bc2?
If it's across the board, could be faulty gpu, but if you're fine on b3,then I'd be fairly surprised.
So that signifies its been likely limited by the cpu, not the gpu.
Is your overclock definitely stable? Try lowering it a bit, to say 3.6ghz, and see if there are any improvements. If not, I'm afraid that this could just be the performance your system is capable of. As I said before, it's not fantastically optimised.
Anyone else have similar specs that they can provide a benchmark with?