I've found that while many Reconstructionists are individually supportive of decentralized government--and while I agree with much of so-called "reformed theology"--I can't imagine a Reconstructionist America becoming anything less than a tyranny, eventually.
Reconstructionists are best toppling their intellectual opponents: dispensationalists, antinomians, and the like. But in practice, even on a personal level, they're a disaster. It is hard to imagine a more disenfranchsied, intellectually arrogant, and self-righteous group than some Reconstructionists. (Of course I'm sure the Roman Catholics could have said the same for the Reformers; just an observation.) This may explain why so many Reconstructionists have vicious and very messy--very public--falling outs. Quite frankly, if you can't even get along with your father in law, you have no business telling us how we should run a society.