I have a CSR Elite and my biggest issue with GT 6 and the wheel is gone. I can now feel the rumble strips quite well. I even turned my FF down to 3 now from 5. Run gold lap times in spa gt academy for a full shakedown of how this update effected your wheel.
Additionally I can really feel the car rotate in trail breaking and control it. It simply feels much more responsive and alive.
Others suggesting the wheel should lighten up more on oversteer; this was a great trick to help the player feel rotation in Forza 4 in the absence of visceral sensations. But this is in fact unrealistic. I do still feel the wheel go a bit "flat" when I exceed the slip angle or loose grip with any tires and its diffrent between front and rear tires and is quite convincingly realistic. In a real racecar, at the slip angle, the wheel lightens because you are effectively "drifting" ever so slightly. Racing at the edge is the art "slipping" through turns... If you have full grip then your not going fast enough... And steering to much.
To me, there has been a major update to Logitec drivers/interpretation, and the adjustment in physics further highlights the changes.
I don't have a TS500 but I might suggest that any adjustments made prior to the update to compensate, might need to be re investigated to get the right setup.
Related but not exactly on topic; if you, like me, are waiting to see how the ps4 handles our last gen wheels, I learned at E3 of new wheels coming this year from a major known manufacture. And they will be very nice, but the mysterious part is that they will be doing diffrent versions for ps4 and Xbox... What can we assume know knowing this? No more "all in one wheels"? Is it the Xbox forcing a separate version but the ps4 might simply be an upgrade? Both should still work on PC.
I wish this wheel thing was certain as it will decide the console wars for me as a consumer...