i dont like the idea of counter knifing. If an enemy spends the time to walk right upto me and i dont notice i deserve to die. I think frontal knife should do 50% dmg always with no auto animation. Only from out of los should there be an auto kill animation (with no counter knife at all).
I'm not a great fan of it but if they are going to have counter knifing it needs to be something like that - so many situations it penalises the person with the faster reactions/better skill as the slower on the uptake person is almost guaranteed the counter.