I keep seeing small improvements to the game as I continue to play the alpha. One problem that everyone keeps talking about is the dialog. I'm sure we'll see more improvements as the game develops.
When I play I usually talk as my main character just because I don't want to have to go through every conversation four times. Some of the things that I dislike are when playing single player having to go through four dialogs just to have everyone agree or disagree on the same thing. This works for coop because each character is played by someone different but is annoying in single player. A solution could be to have it so only someone controlled by a player can talk. Get rid of the all 4 party members chiming in just to say they agree or disagree. For story element a party member can get an exclamation above their head saying they want to say something but the player should not control what they are saying. I don't know how this would fit into multiplayer though.
Another thing I would like to see some kind of memory with the dialog if I piss off a merchant as my main they might not want to talk to any of my party members regardless of race. I don't like that each character has to go through the same set of dialog over and over. If there was some sort of group dialog where each member can maybe say what they need to say. When the conversation is over it's over never repeated and you're stuck with the outcome. In multiplayer this might be possible by having everyone that is near the npc talking they can all see the same dialog at the same time. Each player has a chance to say something giving all the dialog options. This could make for interesting role playing and if there is a party member that is somewhere else not with the group they aren't part of that dialog. Then whatever they are doing is uninterrupted and if they need to go talk to the npc to get the information then make that conversation possible.
Finally, get rid of merchant dialog or change it so I don't have to talk to them just to buy something. Some conversation is okay but when walk up and try to trade and then have to sit there for 3 minutes talking to them just so I can walk away it gets annoying.
Those are just some thoughts I hope something changes so it gets better but I can't wait for more updates on the game. I know they'll be coming but I want to see more premade characters so we're not stuck with only a few option for companions and I can't wait to see the undead race.