I actually thought the Robin thing was fine, because John Blake wasn't a robin. He wasn't supposed to be Tim Drake or Dick Grayson. He was just someone who took up the mantle, and Nolan threw in the name as an acknowledgement of the history of the Robin character. But he was never based on an existing Robin.
That isn't the case here. Michelle is apparently going to be based off MJ. And the name change is just pointless. I liked her character, but I would have been fine had they kept her totally original, or just have her name reveal be Mary! Even though she's not the MJ personality yet, I can see a route where she evolves into that.