I agree. It's very annoying. You can fail all your fight strategy because an enemy has suddenly moved his whole body just for a graphic effect. What about an option to remove the idle animations during fight ?
I would not go so far as to remove ALL idle animations during fight - the game would then appear very "frozen" in my opinion. However, what I think could be done is that if you hover with the mouse over an enemy in order to shot/attack it, then only just this one particular mob "freezes" and does not perform any animations so that you cannot misclick.