There have been a number of discussions of ways to get parties more involved in conversations over the course of early access. I think it’s fair to say that pretty much everyone thinks it would be a good idea, though opinions vary on the best way to implement it.
Personally, I’d like to be able to see the response options for the character currently leading the discussion only, but be able to swap to another party member close enough to pitch in if I want to and have them reply instead (obviously using one of their specialist options if they have them). And to have NPC companions chip in with opinions more often. But not to have all their response options just laid out there, as I feel that suits a game like Solasta where we are effectively playing the party, but would interfere with my primary identification with my main character in BG3.
Something Larian have said about the difficulty of implementing party conversations in multiplayer make me doubt we’ll see much change from EA in the full release, but I guess we’ll see for sure in a few days.