Other than fates falling out of favor with most people, I haven't noticed any significant changes from ARR to now that would inhibit socialization. Granted, that is a big change. I just talk in dungeons and say random stuff and it tends to start interaction. Of course, sometimes everyone is suuuuuuuuuuper dedicated to blitzing the dungeon as quickly as possible and that means no talking ever, but whatever. That's their prerogative. Other times people are really chatty in return.