Of course not. Good story telling can be told in many different ways. Just look at Pixar and the new Disney films.
It's just a matter of taste to me. I love Toy Story and Finding Nemo but I also love Game of Thrones and Deadwood. I think a darker Star Wars would be refreshing. The prequels needed to be darker given the subject matter. Jedi's should have been hunted down and murdered. Not going darker does not do that story justice.