That's a very interesting take on the hood idea! I, too, am interested to hear it's impact on aerodynamics, cooling, etc. I have a cheap, normal sun shade and don't use it due to obstruction in video. I still want to have something to provide some extra protection for the gimbal in the case of a crash.
When the Mavic was first introduced, I thought the gimbal dome was such a great idea, never considering its effect on image quality. After one flight it stayed off except when storing the drone.
I'd be very interested in getting one of these. I'd even be happy to test the idea, too! Great idea!