I agree, I would love to dim some of the UI/HUD elements

It would be nice if we had settings that would allow us to set different HUD elements to auto hide after a set amount of inactivity. For example,
chat box auto hides after a set amount of time of no activity (like 20,30,40 seconds)
cross hot bars and and vertical/horizontal hot bars of our choosing auto hide after a set amount of time of no activity
mini map auto hides after not moving your character for a set amount of time