I will be brief, since I'm almost sure this has been brought up before at least once in some manner. Consider adding some actual black people to the game, and not just as mercenaries. If the Nubians existed enough to be hired as mercenaries, then maybe you might think they must have actually had a distinct civilization? And that is just one black, African civilization. I know your game is meant to be about Rome (as usual) and their contemporaries (as usual). In other words, very Euro-centric.