I used to disfavour having civs in Civ that weren't historically civilised. But let's face it, nomads are cool. When all DLCs are rolled out I hope we end up with a full slate of steppe pseudo-civs Scyths, Huns (to include Bulgars), Turks, Uighur, Mongol and Manchu would be boss. Some mechanic to allow cities to pack up and move around is probably more than the game can handle, unfortunately. Kurgan rocks as a tile improvement. Time to bring back The Motherland Calls wonder?