Some other things for me.
* If you spared Saskia then she's got a quest like Letho where she's on the run from Nilfgaard Dragon Hunters out to destroy her. You can protect her from them as you find out the sad fate of the Pontar Valley Kingdom and how it's all under the control of Nilfgaard now.
* Iorveth, as he always lives, is running a resistance campaign against the Redanians and Nilfgaard in Velen. Geralt can convince him to either side with one or the other depending on his mood and this results in territory being given to the elves by one side or the other.
* If you spared Saskia then she's got a quest like Letho where she's on the run from Nilfgaard Dragon Hunters out to destroy her. You can protect her from them as you find out the sad fate of the Pontar Valley Kingdom and how it's all under the control of Nilfgaard now.
* Iorveth, as he always lives, is running a resistance campaign against the Redanians and Nilfgaard in Velen. Geralt can convince him to either side with one or the other depending on his mood and this results in territory being given to the elves by one side or the other.