Many of the 'splat' powers are still producing horrendous frame rate drops.
When my warshade turns on his orbiting death, the frame rate drops from around 30-35 fps down to 4-8 fps if he is by any kind of wall, desk, etc.
I just got a new GeForce 6600 (w/512 RAM), and these are still the numbers I'm seeing. I'm also running a 3.2G intel P4 w/1G system RAM.