It's pretty damn good! Thoroughly enjoyed what I've played. The Dual Hatchets and Switchglaive are incredible additions. Combat is as great as ever.
The Kodama are still adorable. Koei Tecmo badly needs to make some merch!
It's up until November 10th, and completing it nets you a special reward. Also, having Nioh 1 save data adds William as a character skin!