I actually really like that all four pc's in SP can talk to people. One of my favorite moments in Fort Joy is with Butter. If you hit on her with one character, and then claim that you aren't really interested in her, and then if you try to hit on her with a different character she will outright refuse that characters' advances because she has already heard that line. Also in a lot of instances if you say certain things as one character it locks you out of talking to that character with others.
I think more instances of the game remembering which characters have already gone through which dialogue, and changing the options these other pc's can say, and changing what responses npc's can say, would make for a better experience then what you are suggesting.
Last edited by Damashi; 19/09/16 10:14 PM.