Isn't Kingmaker chapter 1 already longer or as long as the entirety of PoE 2? I know you can definitely finish base PoE 2 in less than 25 hours.
Oleg ->
kidnapping because you searched too far away -> Sycamore ->(eaten by floating skull because of being stupid, end of ironman next attempt) Stag lord -> do you wanna to finish rest of the stuff, or can we just time skip to big glorification?
Oleg if you prepare isn't entirely suicide. Sycamore is large map with underground, that large map doesn't happen again. There is (optional?) small dungeon. Stag lord related areas. First chapter isn't that large, when you play ironman don't reload one combat 30x, and don't count area transition loading times. (Actually I changed to: Party wipe and loading last autosave don't break ironman.)
Not sure about PoE2 because everytime I want to play it, I remember I didn't finish PoE. Then I start for two hours thinking if I should finish PoE. Then it's night and I go sleep. Technically story sucks, thus I will not break story immersion by playing it with half year interruption. But combat feels stupid, weapons doesn't feel lethal, and attribute system feels like someone seen RPG used attributes, thus he can have some numbers and character system, and it would be that thing.
Skyrim and Morrowind felt larger than Kingmaker.