I definitely will be very upset if the AI personalities won't be implemented, but Swen has said in recent videos that they will be.

I know why they're holding back on the AI personalities, though.

(Trait) Bonuses for Conversation are Ambiguous
Originally Posted by "Lar"
We'll be going through the traits system shortly and you can expect changes. The assignment [of] boni so far was rather arbitrary and served more as a test of the dev pipeline. Your points are very valid btw & reflect the original vision more than the system as is.



The personalities are supposed to reflect a character's Traits, and because the current Trait system is basically a placeholder, they need to change the Trait system to be better before it makes sense to add in the AI personalities.