It's not that overpowered. Simply if your opponent is using kick, go for thrust attacks. If your opponent is using thrust attacks, go for chamber. If your opponent is using chamber blocks (parry&riposte), go for holding your swing. If your opponent is holding their swing, there is nothing you can do. OH MY GOD HOLDING SWING IS OVERPOWERED! NERF NERF NERF!
Seriously though, if you are concerned of kicks; simply change your playstyle a bit. Use German Greatsword, Great sword if you're twohander; or use tridentlike weapons. And try to get not too close. It's not darn overpowered. It's just you are underpowered.
Edit: I forgot to mention espada eslavona. These weapons are useful against armor if you know how to use them. And even more useful against low armored opponents.
2nd Edit: I forgot to mention it is much riskier than in native, that to trying to kick a character with a high athletics. Well it's less risky against a character with high STR for sure. But since many people complain STR is way more powerful than AGI, you can't complain for that.