There's a bit of a pattern in Act III with the companions becoming less "people" and more "video game characters" - collections of pixels we're not really supposed to get attached to or take seriously. Possibly just another symptom of Larian running out of time to polish things.
Couldn't have put it better myself. Honestly, entire act 3 is just a mess. The only thing that is polished in act 3 is House of Hope.
