RIP Ninja

[Kiroh]

No, the original was that impulse drive had to land a hit from behind to chain I to the other two (but disembowel/chaos could be from anywhere)

But they did have damage bonuses from being in the correct position, which has been removed from Impulse Drive (requirement) and from Disembowel (bonus) and added directly to the skill damage by default.

[Allyrion]

But they did have damage bonuses from being in the correct position, which has been removed from Impulse Drive (requirement) and from Disembowel (bonus) and added directly to the skill damage by default.

What's confusing here?
They took away ID's positional requirement and added a positional bonus to Chaos Thrust.
They left the positional bonus on Heavy Thrust, and the buff doesn't have a positional requirement anymore.

SE are okay with positionals once they're bonuses.
Trick Attack seems to be a noticeable exception but it's basically a raid cooldown, so that's probably why it's exempt.

Just because they said they have new positionals on NIN, there's no reason to assume they're requirements.
It's going to be bonuses like the other two melee classes are designed for.