I agree, definite improvement with the new lighting/shadow solution. I find it even a bit darker than it needs to be, you could reduce GI to 3/3 even, and perhaps bring GISD to 50px radius (if falloff is disabled) to strike a better balance. But if you like it that dark, then I agree 4/4 should be fine still, and save you a bit of render time.
Well done!
- Oshyan