Not sure if anyone else has run into this, but for me the parry when using soaring blades as an Etoile is incredibly inconsistent. I can parry perfectly fine with plenty of other abilities but the soaring blades parry does not seem to work for me half of the time. I even recorded footage/screenshots to make sure I'm not crazy, which can be found here:

The JPG screenshots are of the first frame the weapon action becomes visible on the screen. For reference, I've tested vs Masquerade and VR Rockbear with plenty of other parry-type abilities (unarmed dodge, braver counter, hunter parry, hero counter, etoile double saber counter, etc.) and have a near-100% success-rate with them so I definitely know the timings for the attacks.