I do think it could look nice in Africa IF they follow the design motif established at Hong Kong Disneyland's Festival of the Lion King. Their's looks really nice like it is in an African village with the landscaping, straw hut roof, African decoration, etc. I hope if this is true they follow that look rather than copying the craftsman look it currently has.
I think that if they build it kind of separated from Harambe village, then it would add more to the area thematically. Guests can travel from the more urban village to the wild Savannah where the show would be.
However, the move to Africa is a little concerning to me. Everyone seems to always be concerned about the character invasions of the park. I know many think that the show fits better in Africa but realize that Africa at DAK is supposed to be a REAL, ACTUAL interpretation of the REAL, ACTUAL Africa. In Africa there are no talking, cartoon lions. It was supposed to be REAL. That is why all the Disney characters were contained to Camp Minnie Mickey. Only Flick is in the Tree of Life but all the other lands are devoid of Disney characters. It was nice not having Disney characters down our throats all the time. In Tokyo DisneySea, there were no cartoons as they represented real places. I always thought about DAK like this. And the focus of the park and Africa should be on REAL animals so I hope FOTLK does not take away from the Realness of the area. However, it is a fabulous show and I think it is worth the compromising the theme in order to save the show. Without it, the park would be missing a lot.
Regardless, I think if they build it like HKDL, it will be a nice addition. Just don't do it on the cheap please.