So, MP-Blood interplay (deepened resource management), 47.5% Haste uptime (speed tank), Bloodweapon/Delirium being more than a poorman's Infuriate/Inner Release and making skillspeed not a turbo-griefing stat? Do these not matter for identity?
Also, I think it is more tasteful to empower your attacks with Dark Arts than to toss out magical Shintens (Edge).
Functionally, just like Kaiten, it's just a potency timed at certain points in your attack flow, but it feels different because of the intent of empowering a skill rather than to use an OGCD you could press anywhere from two gcds before to after with minimal difference.
