some plot points were kinda left unresolved that might make the part as a whole feel left on the table but as an ending to the story of the curses surrounding the Higashikatafamily and the journey of Josuke I think this was a great ending. From accepting he isn't Josefumi or Kira, to calling...
I looked it up and people make it sound like Enma and Ermes was just shown as a reminder that human woman are indistinguishable from rock humans but WHY those 2? I'm not convinced that they AREN'T retconned to be rock humans because out of all the Jojo girls these 2 are fairly obscure choices...