In my experience, this mechanism is an anti-pattern.
Mine too, I have seen this grind a dojo to a halt as people haul the design back and forth in competing directions. --MattWynne?
I've seen it work in small doses. If the driver is lost, and someone else knows a good solution, it can be worthwhile for the someone else to drive. But, the decision must be made by the current driver. If they don't want to pass the keyboard, they don't have to. --RonRomero