The content itself is pretty meh. The first main mission is the only one that's actually new and as Ritley said, it's really really meh. Just has no flow to it, and it just seems to meander way too long. Second main mission is cool but the middle 2/3 of it is a level from Nioh 1's first DLC. The side missions are mostly rehashes of zones from 2 (mainly the dark forest one). Story is really borked, not that I really care in this game, but you legit have two missions and they try to make it sound like you were on a long journey with those characters in the interim when you have known them for like an hour in game play. I have a feeling all 3 DLC are heavily tied together moreso than 1, so that may all pan out by DLC 3.
Game play additions are awesome though. Love the new Guardian Spirits and Soul Cores. Love how you can level up green soul cores to 20. The picture scrolls are great too and remind me of the item world from Disgaea. The addition of Graces is absolutely tits, and I love how you can get them on any item you craft. The new sets are bleh but overall, the sets in this game are pretty mediocre overall anyway.
I personally love grinds so the item grind appeals to me, but yeah with Star stats returning and it's looking they can only be rolled on dropped/crafted items it's going to be a hell of a journey for me to get exactly what I want: melee damage to x infliction enemy on weapons, skill damage on armor pieces AND to have the certain grace I'm trying to roll. Obviously I'm working on the grace/set combo first then as I play I'll try to roll items with the star stats I want. If I get it all, my guy will absolutely fist fuck anything in his path.
The other thing is they did some serious nerfs to some things. Honda clan got absolutely fucked up. They didn't just adjust it, they absolutely cut it to pieces so badly, it's not even recognizable. Their 28% buff to skill damage was OP as hell, but now it's 7% which isn't even worth it. I went back to Toyotomi with the heal on amrita absorption and it's still insane. 132 per absorb, and with extraction, I'm full health after every single combo. Apparently the Tengu bird GS got nerfed too, but I hated that thing so never used it. I also think they shortened buff duration too because at first I was really struggling to keep them up and now, it's still shorter. Not by a ton, but enough to notice.
Had this come out in May like it should have, I'd have loved it despite the obvious cut corners on the levels. But taking 4 months for this is kind of unforgivable to me. Here's hoping it's because they worked on all 3 at once and the other two will come out quickly and once the whole picture is in place, it'll all make sense and come together.