Oh god, forget I mentioned it. I have a headache from trying to figure out your reasoning. It's either too elaborate for me to understand, or it's simply a shameless stunt of a hiltslasher, trying to protect his best source of kills.
Unless I'm mistaken, Xant is a 1h.
There is nothing broken about castor swings. They are not difficult to counter (even with 1 wpf) if you are paying attention. They serve to break up the dull 'block, attack, block, attack' rhythm of fights.
When I play 1h, I'm far more afraid of opponents who can consistently land kicks than I am of opponents who can castor.