1) displayconfig-gtk writes an xorg.conf that prevents xrandr from working properly
2) displayconfig-gtk does not use xrandr to perform operations like adding/removing displays, rotating the screen, etc.
Bryce's work on a new tool is a reasonable fix for #2, but no one has said if #1 is fixed yet.
It seems like there are two bugs here
1) displayconfig-gtk writes an xorg.conf that prevents xrandr from working properly
2) displayconfig-gtk does not use xrandr to perform operations like adding/removing displays, rotating the screen, etc.
Bryce's work on a new tool is a reasonable fix for #2, but no one has said if #1 is fixed yet.