Dishonored is one of the best videogame series that is not strategy or RPG. So I can understand Nick wanting to experience it again.
It does a weird thing with morality though. Playing the first game in a complete stealth/pacifist way is exhausting. And in this game you get the usual immersive sim arsenal plus magic, so you lose all the fun of throwing enemies into the pit with whirlwind spell, or sending an army of rats at them, or making them shoot their buddies. Morality system burdens you. It’s gentle: you have to kill no more than ~20% of people on the level, and in practice it means that if you even attempt stealth and only kill those who attack you, and you don’t try to clean up the level - you’ll be fine. However it’s still there forcing you to be good. Nick is also not right about its effects, it certainly changes how characters talk at the very least. Plus both games have a great variety of other choices and consequences. You can skip a whole huge level in Dishonored 2 if you solve a riddle.
It’s sad that the chaos system only counts murder as morality meter. I guess there’s in-world magical explanation, you affect the world with your attitude. Many of the things you can do without murdering people are very interesting, often evil. Relatively benign things are curing a mad maniac, gathering evidence to put a person on trial instead of killing them (this one is great cause it means you never even get close to your target). Some made me sit and think if it was kinder to kill my targets - like hire goons to cut their tongues and sell them into mines they owned, or electrify a proud genius guy till he’s an imbecile. Some are borderline ethical question - would you kill a vile woman or help a creepy stalker dude to take her away to his faraway island with a guarantee she’ll live a long life with no chance of coming back?
One bad thing I’d say is that the game rarely acknowledges those things, for most non-lethal solution you don’t even get any special dialogue from your friends, they always refer to your victory as “you got rid of that dude” or something. Dishonored 2 is a little better in that regard. It also had a more nuanced but weird morality system. You have an ability to learn people secrets and can see how evil they are. So killing bad people is still bad, but not that bad. Sorta.