I just installed Kali weekly release (2020.1) with KDE and XFCE and all things seems to work very fine. But one thing with XFCE is that when I try to start things fron XFCE that use root permission it wont work. Strange errors or the applications just do nothing.
gksu is no longer availble
pkexec dont work for me yet
But when I install this package, pkexec start to work and all the applications that failed before starts working.
sudo apt-get install policykit-1-gnome