This movie can't be named as "Exodus" since it didn't translated from Bible. It just use similar name, place and time but not the story and characters.
In the explanation about the movie said in was inspired and interpreted by the story of Moses took out HIS people (Hebrew) out of Egypt. But still you can't give the title Exodus, because Christian will compare this movie with what written in the Bible. Lots of differences in the story, only the name, place and time which similar.
I hope whoever interpreted the story of Moses with this movie will read the Bible completely.