The point of states rights was supposed to be a check against federal power. It would limit the ability of the federal government to decide top to bottom what states could do. Right now, that would be a great limit on Trump. Personally, I feel far too much power is put in the federal government. People really hate that some states will do bad things, but overall I think it would be good. We would have had gay marriage and legal weed.
Meh. You overlook the enormous power of multinational capitalism & the basic premise of divide & conquer in order to profit. If we're to remain a free people the power & organizational level of govt has to scale up to match that of corporate interests. If not, we'll end up as lords & serfs.