I would also like it if anyone in my party who had something to say in a conversation would say it (it's something I and others said in early access too). I think it would go at least some way to giving a more party feel to our single player games, and bringing our companions to life.
Though I'm personally never going to be reloading to hear different dialogue. I'll just keep my fingers crossed I'll hear it in a future playthrough. But even as someone who expects to play the game many times, I'd prefer to hear companions' views multiple times rather than have them rationed out as they are currently.