Personally I think it is something that is brilliant, and it is actually the primary feature that enables autonomous operation as a drone. There are no halyards or sheets, no ropes anywhere. All you have to do is maintain an angle of attack relative to the wind, and you have propulsion.
BTW, the founder holds the wind propulsion land speed record, and the wing design for this is an evolution of that design. When you're moving at 4 times the wind speed, no human can possibly keep up with the continuous trimming demands of a sail. This design does it perfectly, and at an overall reduction in total complexity.