For all users with Impossible QTE´s after changing to 60FPS and a lil bit above. After testing things out for some time i maybe found an "acceptable" solution to fix the QTE´s.This small Fix worked up to 75FPS.
Go to your KID Folder. C:Programs (x86) > Steam > Steamapps > common > Killer is Dead > Kid Game > Config > DefaultGame.ini
At the beginning you will find the Informations that we need to get the Problem fixed. Just change the values and replace the standard ones with my values.