Mods won't disclose when BT is released until the devs tell them to. Just check on wednesdays to see if its add or not in the event updates.

Is shisui kimono bt good?

op from the sound of it,

dodges first attack AND reflects all debuffs that hit him ( like nagato, meaning he is better than immune characters)

undodgeable interrupt mystery

undodgeable standard that also suppresses super armour

chase that causes irremovable ignition and reduces cd

those are just one example for each, his skills all have "y" breaks too, but those are the highlights