The whole escape system has been of concern to me for years. Management of pitch vs seat c of g, insufficient testing and seat clearances for higher yaw rates on F-35B, clearance from canopy debris, the over-reliance on correct posture on ejection, off-axis lumpy helmet vs airflow etc etc....
I'm surprised they even release the stills from the sled-shots and the depressingly large bits of canopy shown in close proximity to the test dummy.
The JPO spin makes me wince - 'we are in the SDD phase...' yet ask them a different question and they champion the IOC declared by the USMC. The spin monkeys needs to sit down and decide if this is an operational platform or not.