I feel you have hit the nail on the head, 'confidence' to fly the machine. In my field the other day, I took my P3P up into the sky just for the hell of it. I could no longer see the machine by eye and was then astonished to discover, from the screen, where the heck I was so hit the 'come home' button. For me, this is a complete failure though glad of this facility to retrieve my bird.
I seriously do wonder if DJI never overcame the problem of a workable screen for outdoors and is the reason the Phantom Controller comes without an integral screen? You fly it, you can't see what is really happening with YOUR screen, you crash it, therefore, your fault!
Such a pity to have paid over £1,000 for a superb flying machine to then have a need to dress as a spaceman to fly it in daytime, though I've already said, some have overcome the problem looking at their exceedingly well taken videos.
Without being able to steer the craft through the screen I can't so far see how this machine is usable, yet many are so doing!
Perhaps DJI should issue us all with a blacked out bird hide for our outdoor ventures.