Hmm you can change it alright, but still under braking the forces are way too high for my taste. As i mainly drive late at night i dont feel like waking up the neighbours with my FFB No way to entirely disable the forces that apply under braking?
You can also try to lower the settings in the logitech profiler, damping gives a lot of forces so lower this a bit, or overall forces can be set to arround 80%.