It is an issue that Africa is too diverse to add everything, but I can also see how it would be difficult to focus on only one country. Perhaps a geographical region could offer both a distinct African feel and look, yet be respectful to the origins (while also being very simlish world?)
As for careers I think an African world would work well with a hotell pack, and could have several different careers tied to that, but I also like the suggestion of a conservationist career focused on this new world as well. And yes, safari might feel a bit typical, yet it is an important part of the economy of many African countries and it would offer a lot of game play, both watching the animals and caring for them).
I also like pottery and weaving being included, and I'd love to add a fashion designer career, maybe with sewing as a skill as well? That would give us three new hobbies/job opportunities and one additional career. The career would also match other careers we have in the game.
I also love the idea of a world that contains both a city-part, and a rural part, so either aspect can be represented.