In the long term what this decision really does is force Congress to do their jobs. The federal agencies were reading all sorts of new power and authority into vague laws, now courts will strike down laws for vagueness and curtail their power to what has been given by law. Then you have the proper role of creating public policy restored to the congress who will be required to actually debate and decide these gaps in the law that were previously interpreted by the agencies. If you think congress will muck it up, I agree, but this is still a net positive. At least then when decisions are mucked up (and they have before and will again), the people mucking them up will actually be accountable to the voters.