A theme park MMO is one that caters for all types of players. I have done Grand Cosmos once. Just because I CAN access it, doesn't mean that it is worthwhile content to me, everyone I have spoken to is not bothered about this change because dungeons as a piece of content are stale and bland. I would say that overexposing players to content that they don't enjoy is more stupid than implementing extremely difficult (yet extremely enjoyable) content.