Haven`t you noticed where sometimes the finishing cutscene actually happens in 1st person? Maybe if younplay only 3rd you may not see it. I find the 1st person mode far more immersive, especially when chopping someone`s head off. This means that t should be possible to make this condition happen all the time. It`s just a case of finding how.
I have, and 3rd person or 1st person, they're all the same. The animation is not only on your body, but also on your target. Even if you skip your body's part of the animation, the target's (could be a dragon, a wolf, a human getting his throat sliced, etc) will still be stuck in that pose.