I agree that the companions just fall off the face of existence in Kingmaker especially because there are so many. You talk to them once, get their story and done except like Linzi or Tristian. I can't even remember the last time I did anything with most of them. They're just there.

In WotR, it's relatively the same, but not quite. There's a bit more companion development and interaction. Sure, Ember has fallen off the face of the planet for me, but I've clearly not unlocked her story yet. She's a total mystery. Although I've brought Selah with me on many quests, she's just there. The tiefling guy might be presently doing something interesting, but Sosiel is a snore. Lann seems interesting, and at least since the counsel started he's back to being interesting again. The noble snob guy at least has an interesting story so far that they aren't just revealing right away and Junio is fun. I love the hell knight gnome too, even if he is evil.