It’s annoyance for eye , and it hurt a feel from combat.
What I’m talking about is lack of knockdown/stun animations for all except human models. I understand lack of resources but something must be done.
My suggestion is to make pop up effect above enemy head something similar how stun looks in world of Warcraft, so we as player get visual feedback of effectiveness of our actions.
Leaving it as it is gives impression of unfinished mechanics.