Great concept, tho i wonder if this mod is still active or was abandoned. If it was abandoned then its a shame cause in its current version is unusable.
Parts, especially command pods, have to high crash tolerance. I tested this mod on stock unmoded game, with various planes/rockets and no matter the speed or angle of crash, no kerbal ever died. If anything command pods simply bounced of the ground in to the sky at speed above 80m/s, some even broke sound barrier.
After checking the damage value some pods sustained 0 damage and others went above 100%. I don't know if my logic is correct here, but if something sustained even just 1% more than 99% of damage then it should be completely destroyed.
If a big a** plane like the stock skyeye fall to the ground at the speed of 200 m/s at 70' angle, it shouldn't just scatter its parts around like Lego pieces, with almost no explosions and most of the parts being untouched.