Duty finder doesn't completely remove player interaction, though it does remove the NECESSITY of it. There's nothing at all stopping you from having a good chat with the people you meet in a dungeon through duty finder. Hell, I've even sat in a dungeon for 10 minutes after it ended chatting with a player I met who wasn't on my server. If you'd like to sit back, steam roll a dungeon, and do it without saying a word, you can. Doesn't mean you have to. Parties CAN be rather silent, it just needs one chatty person to get some conversation going throughout the party though. If you have a problem with the lack of interaction, be that one chatty person. Usually works.