I watched the second time.
Now I have to really criticize the final splatter of an enemy. It is no fun to shoot a zombie in the head and then to see all parts of his body flying around. This really make no sense and takes the fun factor hard down.
If this effect is shown by an big gun, blowing on the centre of the body - it make sense.
But - I can only judge by the vids - it seems that you use the effect randomly?
The final kill act must be a final special kill act. I take this very seriously cause I am looking damn forward to blow them all back to hell.