Even with the broad short sword I still get the stab jam fail from time to time.
Sometimes its unavoidable in cluster fighting where its thickest. Which in turn limits your attacks already to overhand or stab only to avoid team damage.
Many of the "best" 1h players prefer to use weapons with no stab at all because they don't trust the animation.
My only concern with replacing the 1h animation is that it needs to be the same speed and have the same ending distance on the thrust as those aspects effect item balance.
The original animation imo would be better for stabbing to the face but the glancing aspect of it sucks.