I think this post by @patch was the most elegant switch solution. To summarize, it would be a single button to temporarily allow the software to change the state of the switches. I had the same idea after watching the video linked in that post but I didn’t have an account at the time so I didn’t end up joining that discussion. The only thing I would do differently is that I would prefer any additional overriding hardware switches to be under the back cover. With that solution they are less likely to be accidently enabled and it would allow control over every part individually. I know it’s far too late for v1 now but maybe they could implement something like that for v2.
As for the 3 switch GPS kill, I guess it’s probably the best solution they can have with the current design. I wonder if it will kill the accelerometer and gyroscope also? I think that might be a good idea.