NeutroniumDragon explained it well, only one player will do all dialogues because he got the social skills. What we mean when we are speaking about sharing skills is not giving the same skills to everyone, if you got 0 un Barter you'll still have 0, but when you got a social choice that will :
- When you select an intimidate option that use the highest skill in group
OR
- When you select an intimidate option, the game automaticaly change the Character that is talking to the one with highest skill (maybe in a limited range to avoid abuses), that would be RP, and user-friendly.
This sharing could be a choice in game options. Everyone can have what he want to.
