Q: In addition to the new content, does this expansion mark any changes in the general gameplay of the DAoC?

Matt: Not really - in order to solve the Trials that make up the larger monster encounters in the expansion, players will have to form larger groups - just the same as they do when fighting dragons or other epic-level monsters in the game. We are adding some new player abilities called "Master Abilities" that players receive after they successfully complete a Trial, but these are general purpose (although more useful in RvR) and won't change gameplay too much.