Typically for the series in the past it's been the case that if something isn't represented well with game mechanics, then it's best to not include it at all. In the case of the new African areas being added, they basically didn't and couldn't interact with the nations outside their area. What would be the point of having countries that are wholly surrounded by wasteland? Great, they're included, but why include them if they're not going to interact with anyone else in a game all about uniting the world through exploration, colonization, and trade? It'd be silly.
Instead, they made a compromise: remove the surrounding wasteland so they can interact ahistorically with the surrounding area, creating a situation that inherently changes Africa's history in order to suit a different view of how things should work. For me, it's annoying. I like to learn about the area, about the history, and what happened historically. Changing that history because it doesn't suit you is...so very arrogant that it disgusts me.