has some interesting changes.
For once you can end a duel non-lethally doing some kung fu at the right moment after a stun-parry and even drop assassinations have a non-lethal option which allows for a slightly more action-y non-lethal playstyle. Of course it's still not advisable to have multiple enemies and it's more for single guards stealth screw-ups because with multiple opponents chances are a stray bullet or an ill-advised lunge on their part might kill whoever you are trying to stun.
There are also many more power upgrades and runes to collects to go with them. I still have to get my bearings with Emily's power set yet, the particular way the mark of the outsider manifests with her leads to some key differences that are even more marked than between Corvo and Daud (I think you can't possess rats but you can turn into a shadow that can use rat tunnels for example).
I solved the crashes by disabling the AMD overlay, gradually lowering the setting to very high instead of ultra and going for FXAA instead of TXAA.
The plot seems more upfront about things, Emily explicitly knows that Corvo is her father (which was only hinted at in the first game) and that the heart is her mother, probably because Arkane understood that the plot wasn't the first game strong suit and just went with something more straightforward, even a possible "mystery" set up at the beginning gets solved almost immediately. I was surprised to see Billie Lurk, I knew about Death of The Outsider
but seeing her this early
taking over Samuel's role