After 5 months of DD flight failures and frustration I flew 3 farm map missions yesterday with no problems at all. Two with a P3P RGB camera & iPad, and one with a P3P NIR modified camera.
I hope this is a sign that they have listened and are concentrating back on simplicity and reliability. (iOS 11 update is a bit of a worry, fingers crossed).
Well done DD for restoring my faith, I will start paying my subscription again now.