That's homebrew I can get behind. I have some issues with balancing. Stun chance for bonus action is powerful for an "extra" attack - considering how powerful pummel strike and push are, I wonder if Larian is afraid they will not be able to convince mainstream audience about usefulness of utility actions, unless they make them ridiculusly powerful and cheap to use (aka. not interfiering with DPS).
I only sampled a small selection of weapons - but overall I like the concept.