Actually I have full control trough SolexI'm guessing that camera don't have any remote functionality other than an HDMI output since the only means of wired communication is between the camera and the HDMI cable since the hero port was removed correct? Meaning you'd have to start recording before takeoff and have to land to stop or change any settings on it, which isn't that bad, I had to do the same with my hero 3 black...

GoPro Hero 5/6/7 Black Control with 3DR Solo
Ever wanted to use a newer GoPro camera on your 3DR Solo? Here is how you can connect and control the latest GoPro 5/6/7 camera models. By Stephan.
www.hackster.io