There are two main thrusts behind the expansion. First is the overhaul of the graphics engine and a vast improvement in the technical detail as a whole. The new visuals benefit the whole game, not just the new environments. Wherever you go you'll see the benefit.

Second is offering the player lots of new things to do. That especially means that we're galvanizing the lower part of the game for those players who aren't at a high level already. In the last expansion pack we offer high level players lots of new content, but with Catacombs we want to offer everyone more stuff to enjoy. So there's more stuff across the board. That also closes up the ranks between the lower and higher level players, the casual and the hardcore. We found that people who could only fit in an hour here and there were falling too far behind players who were dedicating several hours a day. Those dedicated players will still achieve more in the game than casual players, but Catacombs will allow players who spend less time in the game the chance to keep playing with their friends, who might be at a much higher level.