Nioh held my interest almost up until the end. By the time you get to the final act of the game it becomes kinda confusing to keep track of all the military drama and various generals, demons, and shadowy overlords floating around. I ended up having a friend power run me through to the end cause I started getting bored.
Sekiro made me giddy, then really really pissed. Alot of the stealth kills and enemy types are fun as fuck, the combat just feels great. The problem is the game punishes you for using what are essentially continues, so you then naturally stop using them. Then the game punishes you for NOT using the continues. Even this retarded system wouldn't be so bad if the auto tracking many of the enemies and bosses have wasn't absurdly on point. A lot of bosses are able to randomly glitch/combo you down to where they effectively kill you in one hit, even if they're well outside the usual area of effect. It's fucking frustrating.
I'm sure I'll get a ton of flack from weeb fans of both games, and I certainly saw the appeal in both, but I couldn't stick with either one the whole way through. Just my two cents.