Forgive my ignorance, but isn't the lack of available grip for the tire partially responsible for causing a high side? Obviously power delivery pays a massive part (i.e if you were to crack the throttle open coming out of a corner at full lean on a 500 2 stroke will end badly) but I thought ultimately it occurs when the rear tire stops gripping and then grips again brutally changing the direction of momentum/motion, resulting in flicking the rider over the side?
If this is the case, then perhaps the change to one tire manufacturer for the series has slowed down the development of super grippy compounds? ...Or most likely the loss of made to order tires has meant some people can't get the right compound for how they ride (i.e Elias) and thus are pushing it too hard...and crashing.
* I would also like to add that: I don't pretend to know much about bike physics but I'm always willing to learn new things if someone was willing to explain...
We must go forward, not backward. Upward, not forward. And always twirling, twirling, twirling towards freedom