What is Carve and Spit for?

[Allyrion]

For the very long cooldown it has, it should be hitting 3 times like the description, totaling 1350 potency with Dark Arts. It's kind of annoying that our ultimate attack doesn't even hit as hard as a Warrior's level 54 skill.

Is it that weird?
Ninja 60 skill is a 3 fold attack, and it actually does hit 3 times but it's only 100 potency each hit.
Just 300 potency total, but like Carve and Split it's off the GCD.
It doesn't have anything special about it and has a 90s Recast.

I'm not saying it shouldn't be better, maybe potency wise or with some effect.
Would be nice if it was more signature, but I don't think it's a huge deal that a 60 skill is just another skill.
I'm really against rotational changes (instead of just adding on) from the last ability, like Dragon Kick was for MNK at 50.