Well, I put in a few hours on the new CSW V2 base. I only play GT6 and the Codemasters F1 games at the moment, so I won't be giving PC sim racing impressions.
In GT6 you definitely feel more of what the game FF are. So much so if you've had your Fanatec FORCE not Force Feedback "in-wheel" setting higher than 100, the wheel shakes a lot on the straight aways the more top speed you attain. I turned mine down to 100. You still feel the shake, but I feel for GT6 it's more realistic to turn it down some.
Overall, you feel more of what the game programmed for FF, so people who play GT6 may want to alter their old CSW settings.
The CSW V2 in GT6 is stronger in what you feel in FF and it's smoother. This version of the base will work you a little and that's cool.
The new base is smoother like i mentioned. It's not leaps and bounds, but noticeable. I also feel the wheel has more resolution. It feels that way anyway. It's probably due to the new brushless motor and how the new Hall Sensors work.
Overall I like the tweaks it's provided for GT-6 so far. Time to try some other PS3 racing games and see what goodness has changed.