>>63882475
i doubt differential thrust is fast and precise enough for yaw damping corrections, instead it's probably used as rudder trim. Minor yaw corrections can be done by just moving the mid and outboard elevon in different directions, and the split rudder would only need to be used at slow speeds like takeoff and landing.

If we're talking about creative means of control I have to mention the a3j/ra5 vigilantes slaterons, which work in a similar way to spoilerons (and thus also allow full span flaps), but are more effective because they open a channel for air to flow through.