I use the Saitek rudder pedals, it is only possible to break hard, not to brake soft, even when only touching pedals very light. In the rudder pedal settings window of Aerofly I see that the horizontal bars showing to start at center, that means 50% of full brake?. The similar Windows 10 dialog shows that the pedals act as expected, starting at zero when only touched lightly. I have no problems with the pedals in Prepar3D v4. Changing sensitivity in Aerofly does not have a big effect, if at all. I prepared a video:
The brakes in general seem to act a little hard. E.g. at LOWI I measured a brake distance of 750 ft from 110 KIAS to 0 for the Dash8, and 1100 ft from 100 KIAS to 0 for the A320. Both tests with full brake applied. But this is not a big issue for me. I installed the update from yesterday and used this for my tests and the video.