Ian,
I can upload the crash video tonight. Agree with your comments, but having owned ~6 Phantoms now, experienced many of the various failure modes you listed, and flown several times a week for about a year, I have a very strong suspicion 3.06 is the culprit here. You be the judge once I get the video up. Note that this P2 and H3-3D and accessories had been flying just fine several times a week on 3.04 since early April, including dozens of flights on the site of the crash. The setup was new in box in early April, and had never been crashed. The only change between the fatal outing yesterday and ~50+ prior flights on the exact same hardware is 3.06 versus 3.04. And the departure behavior is so indicative of a flight controller than suddenly decides it should be somewhere else.
Regarding the wedding risk comment by Verticalvue, the filming was done with the full awareness, consent, request of the wedding couple and wedding planner. Groom is a P2 and P2V+ owner. Obviously that doesn't mean every guest signed a release of liability, but this wasn't a rogue "hey won't this be funny" type of stunt.
Kelly