I think the issue is that for a camera that was released 2 years after the Go-Pro Hero 4 everyone expects at least the same quality if not better. From my own video and images and from looking at others, it seems the camera is below the standard of the Go-Pro4. This is a little disappointing since the Go-Pro4 uses a Sony IMX177 processor which was the same as used in the CG03 camera.
If you take the core elements of a digital camera,- lens - sensor and processor, we can fix the lens issue because like most small action cams it uses an industry standard screw in connection the rest we are stuck with.... we still don't know what sensor the camera is using, (some have said "latest sony version") but I've yet to see any proof of this, the processor appears to be an old Ambaralla S2 (security camera module) not a more modern (2 Year old) A9 processor in the Go-Pro 4. It would be great to know where the bottle neck really lies and if any modification is possible.
I think its a great shame that there are so many negative comments on the camera because Yuneec have made such a great platform for it...but at the end of the day it not a racing quad or endurance quad, its a small camera platform and the camera appears to me designed from old or not not even close to the best of what was available. For only a few dollars of saving so much more could have been achieved, the latest sony sensors for example with stabilisation built in only cost about $20.