This might just be a wrong feeling, but it seems like previous to patch 15 the krack was able to oneshot anything walking near it even in damnation.
And now the crusher are just thrown to the ground after it and still alive.
The only thing that was nerfed was krak boss dmg. I can still one shot crushers on T5 just fine. There must’ve been smth interfering or going wrong when your just got knocked over