@Java meh, who cares. Cleopatra VII may indeed have had similar skin tone to this actress. Unlikely, probably, but who cares.
Yeah, it's a little weird when Denzel Washington is supposed to be Keanu Reeves' brother, or Cynthia Addai-Robinson is Trystan Gravelle's cousin (and in that show all the hobbits should probably be about the ~same skin tone for obvious reasons), but little mermaid? Who cares?
Let some actors act and get over it.