i spend time looking at mmochampion for updates on wow. They have been awesome with updates for the expansion, imo THAT is how you communicate with the fans. Do interviews, blog post type updates (more then every quarter) , etc. This gets feedback from the fans to help the developers from falling on their asses when it releases like d3 did. I was in that beta and starting the game until Leoric was fun but limited, i understand they don't want to give away lore and whatnot. In that game it was very single player or coop style and that was it. If this game is more multiplayer with world events and pvp areas, there should be more in the beta to do.
My only ask from blizzard is to give us more information on systems like they did in the last quarter post but more frequently.. if the fans don't like it as a whole then why wait until you have put so much resources into it to just find out its garbage and have to start over. Also i liked the hints that ovw has done in the past with its clues to the next character. should do that with the 2 unannounced classes, old items making a come back etc, that would be fun!