Well the word is that Acacia is due to be split five ways

http://www.worldwidewattle.com/infogallery/species/

Note that there is no such thing as "the African Acacia's".
The group that now holds the type (Acacia nilotica) is spread over
America, Africa and Acia and would get the name Vachellia

I would rather wait for the dust to settle.
PvR