But Malian architecture has been in the game since vanilla. If anything, it's Kongo and the Zulus who need a new style, as the Sahelian city set they're using is painfully inaccurate. Second worse misuse of architecture after Brazil, really. The fact that the Kongo city set contrasts so dramatically with its own unique district, as well as Mvemba's background, is enough to make you wonder why Firaxis didn't just give them the Egyptian set and skip African architectural (mis)representation entirely. It's completely baffling.
It'd be like adding Brazil but not having the Aztecs until the 2nd expansion, but still inexplicably creating a unique Mesoamerican art set solely for Brazil (and La Venta!).