Ah that's good to know. I never have done NG+ even with games I have throughly enjoyed, as there are just way too many games and not enough time. That being said, it seems Sekiro is one of those games meant to reply multiple times. Is there an average playtime or a speed run yet since it's so new?
Guy already speed ran it in an hour. You can skip all enemies and go straight to boss fights FYI. There's absolutely no reason to kill anything other than what impedes your progress unless you need an item from them. All enemies have a leash range and you can even exploit that in order to get stealth kills easily when they turn around to return. It's weird in this game because a true souls game they would backpedal all the way to their spawn so you couldn't do exactly that. IDK why they changed it.
The more you understand about these games, the sillier the difficulty seems. Only boss fights can really give you a challenge which is how it should be IMO.