One thing I love for developers to do in MMOs is utilize pre-existing content. Sure, I love new content with new lore and new mobs as much as the next guy, but I also have a soft spot for nostalgia. When big daddy Blizzard refurbishes pre-existing content and uses it as a selling point for their next expansion it must be the de rigueur. I couldn’t be happier.
There is a big difference between say Turbine’s revamping of a low level zone (which was great) and pulling the older content to the current level of play. Smoothing out some of the egregious bumps is a necessary thing in MMOs, which depend on new blood. Yet, it doesn’t really help the old players. It is nice to see a revised area when passing through with an alt, but it is more meaningful to me if the revision affects my main character.