It sure seems like the UAV industry, small and large, focuses on electronic and system technology. Maybe that is because the people working on these have expertise in that field. The larger UAV's sometimes pay some attention to vehicle aerodynamics. But both industries totally forget about efficient power and efficient propulsion. Why? Many, if not most of the small UAV's ignore aerodynamics and propulsion. If you want range, noise reduction, stable flight, slow and fast, you need to change what you are doing in these areas. As a prop technology guy here, just a look at these makes me squirm.
Are all these things so low buck, that you can't afford to spend the money to make the vehicle work well? So you fiddle with what you know?
I guess you don't know what you don't know?