The De Vespe Conspiracy features the arrival of Princess Aurelia De Vespe, daughter of the De Vespe family and long-term enemy to the D'Orsays, to the island of Teer Fradee. It adds a new area with a new, 2~3 hours long quest in it, with some entertaining new scenes and a compelling antagonist. At the end of the day, though, it's more of GreedFall. You're likely to enjoy this as much (or as little) as you enjoyed the main game.