I can't find it off the top of my head, but wasn't there some talk about that on one of the dev vids? I vaguely remember them saying they were planning on bringing in party conversation options.
TBH I'd love it if they did do a SWTOR style group conversation mechanic. It would be an awesome incentive to play in a group. Hubs and I wanted to group up in DOS2 as well, but it really felt like all the companions were redundant when we did.
