If Zendaya is indeed MJ and they are going for a totally different take on the character, not just in terms of changing her ethnicity, but also changing her whole personality and characterization ( making her a frumpy, "conservative," plain girl who transforms into gorgeous stunner by the end of the film ), then that would be a clear example of what I've been against - making something needlessly complex and convoluted.
It's exactly what happened with TASM. Because you want to be different from what came before, you can't just tell the story from Point A to Point B to Point C and so on. No, instead you jump from A to D to Y to R to B to L to P and finally to Z.
They did that in TASM, taking the relatively straightforward Spider-Man origin story and adding unnecessary complexity to it with the spy parent conspiracy backstory, Uncle Ben's killer having that tattoo with Peter never finding him, etc. Heck, they couldn't even use the classic "Great Power / Great Responsibility" line. Uncle Ben gave a speech to Peter that conveyed a similar message but used different words in a more roundabout way.