"The only feature I've used in GO is course lock when I was letting my wife use it."
You let your wife touch your drone? lol That was funny.
There is a method to my madness

She was having trouble flying the cheap $30 drone she bought herself. She found it difficult to hover in place and when she would rotate the drone found it even harder to control. With the P3S when she took her fingers off the controls the bird would just sit there and hover. With course lock the thing would always go where she wanted it.