I have an issue where dead enemies T-pose, Its bothers me but it's actually pretty funny when you get a "Dance party" going.
There is also another issue where the Assassin dodge does not play an animation, my character stands straight up and slides along the ground.
These are all dead enemies.
Enemies standing still are a byproduct of a fail-safe mechanism regarding Physics performance. It is a temporary workaround until we iron this issue out - basically it prevents the physics engine to do unwanted things so it freezes enemies instead.