Three things jump out at me on these. (I viewed the data for all the logged flights, not just the "crash" ones.) First the motor outputs are grossly spread out. This indicates a frame/build issue of some sort. Motors aren't true in one or more planes, booms not level, etc. Could be garbage-grade, mismatched props, but I've never seen spread this wide from props in the past. Second, this aircraft is under-propped. Motor drive levels are well above the desired 40-60% range for a high percentage of the flight. Third, the motors and/or props are out of balance as vibration levels are unduly high at all times. Any of these items, and certainly the combination of them, could lead to the the FC loosing it's grip at, any moment.