We have the federal government when needed, but it doesn't control our every move. Diversity jurisdiction helps us to keep our freedom by restricting federal government and giving more power to the states. Explain further, if I'm missing your point. Will, I see what you are saying. I think you make a good point.
Diversity jurisdiction does force the federal courts to have some involvement in state court issues.
Perhaps it is good to operate somewhat together rather than totally separate since that would elevate the federal courts even more than they already are. In any case, my point is simply that I don't think anyone wants to take away the clear-cut state law cases from state judges. I don't want to take the cases out of state court, but I wanted to reverse the argument to show that it is flawed. I don't think that it is taking state law cases away. I though that the cases that are removed from state court are cases that have a federal question.