I've spent my time continuing through, and then finishing my first run on the new Suzerain DLC.
Had a good time with it but I think it's maybe not as.. fully thought out as the games OG campaign was. That said, I'm definitely going back to it at some point because I made some frankly awful decisions and it all went wrong very quickly.
I was a bit worried about how well the Steamdeck would handle it but I actually found playing with the Decks touchpads to be preferable to the games gamepad mode.