You seem to believe in a weak central government and strong state governments that try new approaches and get shit done. This is nice, except most libertarians believe in weak governments in all levels of government. No, not a government that works as well, not an efficient government, but a minimal government.
As an example, take the health care debate. Compared to some european countries with good healthcare systems, the US spends substantially more (~15% vs ~9% of GDP) covers substantially fewer people (the millions without coverage) and the overall health of the population is poorer. By nearly all objective measures, a good public system is much better than an all-private system and yet, we know this is not compatible with libertarian ideology - you will have to search far and wide to find a libertarian group that supports a public healthcare system.
Like I mentioned above, the libertarian ideology is one of minimal government, which is sometimes, but not always the best type of government. This is why libertarianism relies on simplistic catch-allisms (government=bad, regulation=bad, private-good) and parodies of reality like Atlas Shrugged and other Ayn Rand fiction-pseudo-philosophy writings and not your idealistic "engineering and scientific assessment of reality" idea.