The stepping over command should only be functional when you are next to something that needs to be stepped over. It looks silly when it happens in a clearing, and can lead to a miss key in a critical situation which can be quite frustrating.
Having it so you can step over nothing in an open clearing not only makes the game feel more clunky, look silly or result in an un-needed death, it would eliminate the glitch of stepping over something longer than the width of a fence and becoming stuck.