I just don't find the skill that worth it. I use it, of course, because a free hit after phase transition is a free hit. Still, over the course of a fight like Titania Ex, you'll use it twice for a 50-80 dps gain for the whole fight. It's really just a tiny drop in the bucket that won't make much difference if you use it or not. I think that's my biggest issue. That and you can never see the full animation because you'll use it as soon as you can and cancel the animation with your next GCD anyway.

It's not completely useless. It's just kinda there and doesn't really add anything to the Samurai toolkit and you wouldn't really notice if it was gone. Seigan is the same way.