It's more than that: it's the best thing that's ever happened to Civilization V. I would be doing Brave New World a disservice to call it Civ V's best expansion pack. And Archaeology adds something truly new to the Civ series. The World Congress and the Ideology system make the late game much more exciting.
The new trade system and Culture Victory transform and revitalize the builder game. I've been playing the expansion for a few days now, and I am very, very happy to report that Brave New World is fantastic. Civilization 5: Brave New World review time! The latest and most likely final expansion to Civ 5 is out tomorrow (July 9) for North America, and July 12 worldwide for both PC and Mac.