I won't speak too much about this since I don't main NIN altho I do play it.

But my reaction looking at the footage is that NIN feels slower and like the Trick Attack window basically boils down to your Ninjutsus and the Raiton combo.
I am unsure how I feel about this, it didn't excite me honestly.

I am also kinda baffled by people complaining about the animation lock.
You don't have to instantly use Assassination that's just a player issue if you die or take damage because of that.
Was it really such a problem that they had to remove/ merge it?

I also think that the Raiton combo should be a OGCD.
Or if not that then at least Phantom Kamaitachi should be a OGCD I was pretty disappointed to find out that it wasn't because that was my immediate thought when I saw it in the trailer.

NIN in Endwalker basically looks to me like a slower more magic-based Job.