Is Ninja really that weak?

[Arkenne]

I wouldn't say it's weak because Trick Attack exists.

On the contrary, it is weak because it HAS Trick Attack.
It would be one thing if the job revolved around placing and sustaining TA on a target, but its not.
Its one out of about 18 offensive skills in the toolkit that its overshadowing all the others because it simply is there.
As it is right now, we are a 10s Vuln up debuff bot on the boss, and full time attack down debuff on the party.

But know what? Im going to give SE the benefit of the doubt:
It may NOT be because TA exists at all, but because SE thought the potencies were enough.
I mean, there are so many changes to the NIN toolkit that it may have been a tad too difficult to balance before launch and we are actually Ninja-beta-testing it.