Sorry Fred, I do not agree on the described risk.
If you keep the stopper features as delivered, then it stops after 55 degrees turning and in addition your foot will also twist within the strap approx. 20-30 degrees.
So falling forward you can point your toes towards the tail of your board and then you already have had much more time to get out.
I have use this setup for over 2 years and pushed the crashing in so many different ways. When ever there was a problem, then it appeared on my fixed backstrap as loosing the front strap gave me no time to react
As decribed in the instruction: you can choose to remove the stopper
and your board can actually make full turns. I have of course tested this too - for many sessions.
If you want this level of safety you just have to fix the bungee in place once in a while.
This product has now been on the marked for over 2 years and lots of experience has been collected in many customer mails. I feel pretty confident that it does not create new problems compared to fixed straps
and I would like to change your postulate to "Kitesurfing can be dangerous..."
Hope all this sound reasonable and for those who seek the ultimate safety and freedom it can only be riding strapless. "Everybody should choose its tools for fun."