Here is the review so far:
http://mapillary.trydiscourse.com/t/yi-360-vr-camera-review/2935
Status in a nutshell:
The result is now that I can use the high resolution movie setting and intervall, but the image quality of the seperate images is better than image grabs from the movie (at the same resolution). And I offcourse want the best possible image I can muster out of the hardware 
I tried opening the camera up, but I didn’t go all way because I feared I was going to crack it open… resulting in perminant damage (hoped I could solder extra connection to the button and create an interval that way.
Mapillary updated their app, we hoped that would fix the bug I encountered, but alas…
Via the Mapillary app would be ideal… but I think it’ll be a while for Mapillary to get around to fixing this… so I will now try a machanical approach…
I’m on vacation now in France and brought the YI360 along for the ride. I have walked trugh the small village here and will use the data to optimize my workflow.