Not all those part of Black history are American, so reverting to "African American" would be doing a disservice to those folk.
To note: Gene Rodgers, a Notable Black American, had non-American parents, non-American grandparents, non-American great-etc grandparents.
To label him as having "African-American heritage" would be downright wrong, and totally incorrect. He is part of Black history, however, and the current wording reflects his Black Heritage, while not incorrectly labelling him as "African-American".