The release of the original Dishonored 2 was a mess, killed weaker computers, the controlls were messed up because of the porting etc but they fixed it slowly, Death of the Outsider was smooth from day 1.
It is a great game, some new powers, new territory, a bit more dishonored. new game + is also ejoyable, because you get different powers and so, different routes to mission objectives. Because it is not as long as the main games, totally viable to beat twice, like i did. A bloody and a shadow playthrough. And of course the two different endings.