I hope this is just be because it is early access and its easier to place these movements and expressions into every conversation as a place holder but my fear is that its intentional. That in order to allow the player to interpret what type of emotion is behind each conversation choice they left the character's expressions as vague and noncommittal as possible. I don't know about other people, but I would much rather have a character that expresses a different emotion than one who doesn't express any at all.
No expression at all sounds better.
These facial expressions betray how the PC reacts to things. And those reactions are very tied to personality. Which, for a Custom PC, should be player-defined. Maybe I'll want to be play a green city-dweller who's afraid or disgusted of every other new thing met. Maybe I'll be a hardened Outlander who's seen a thing or two. Larian can't cater to all PCs, so it's better to simply not show reactions. Let players imagine how their character would react. The camera could stay focused on the person speaking or the thing happening.
There was a discussion somewhere (OP was Dotsmat, I think, can't remember title), that convinced me that, in Larian's vision, the expected way to play is the play an Origin Character. These generic/vague facial reactions are probably placeholders, to be replaced by the actual, relevant reactions for the Origin Characters.
But I hope they then let the Custom Characters be custom.
