My thought is that Witness role is a really important work, more than devs role. They are the judges of the system and they have to behave as so. Looks to me that is very easy for the 20 first do nothing and keep their power here... because, seems that they defend each other...
A better and more balanced witness reward within the 50 first witness would help in order to increase democracy...
About the test... I don’t want to add anything...this failure cannot happen again