The source is here.

Unlike the previous two pay-for expansions for DAOC, the new graphical updates run off of the same Trials of Atlantis (TOA) engine, so if a graphics card will run TOA beautifully, it will run Catacombs beautifully as well.

How stupid. It’s exactly the opposite. ToA engine runs like CRAP already. The fact thet they will increase the load of various times means that they are fucking the whole game.