I talked to marox about this because i was a little confused too -
"the approach of blocking kick with kick was fundamentally flawed, and was barely possible/ not possible in some cases, also limited us a lot in what we can do with the kick "
"the main problem with this "it's the equivalent of throws in fighting games" logic is that it fails hard because the kick roots you in place making it possible to footwork, which needs to be possible because in some cases you can't counterkick like after being parried etc"
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kicking (form of attack) and parrying follow different conditions on when you can do them, so sometimes you'd get flinched and get kicked yet you can't do anything about it. Also, now you can use kick feints to bait panic parries, which makes kicks more useful overall.