I whole heartily believe this to be true, a vote-kick would be great but the only problem to that is Tanks are a pain to come by and healers are 2nd up in that running. People normally don't like to pursue a partially completely dungeon because they miss out on loot. I think they should implement cross server dungeons like they have in WoW to be honest just so if they implement a kicking feature for the slackers then the wait time wont outweigh the cost.