Kick needs to be on the same cooldown as nudge. Duel server lately is all swashbucklers mashing V nonstop, followed by a kick and a free hit. It basically has no counter.
Also, if you are going to make all these mechanics that nullify someone's shield skill by pressing one button, how about adding some bonuses to shield skill, such as:
-Shield skill reduces effective shield weight
-Shield skill increases crushthrough resistance
-Shield shield reduces bolt penetration chance
...etc