Lower government control is a hallmark of conservative and libertarian principles.
No...libertarian and conservatism are just opposite in this outlook; libertarians want more things legalised, and less government spending of all kinds, while conserves want more things illegalised, and more government spending - as long as it's not public spending. That is the politic compass meaning of them, there are also more specific meanings, but they don't contradict this - just put conservatism and libertarianism in more meant places about how much they want to spend/lower spending and legalise/illegalise.
Almost all conservatives call for a smaller federal government and less government regulation, although some are less honest about actually doing this than others.
They wouldn't be conserves, then. Also, regulation is not part of it, nor is really decentralisation. That, conserves and libertarians can go wherever they want, it's not part of the economic-authoritarian spectrum.
Liberal Democrats on average favor greater government regulation, spending, and control while conservatives advocate for limited and smaller government.
Don't let a proper name of a politic party fool you. I mean, you have the Republican and Democratic parties in America, even though a republic and democracy is the same thing? Just if they say they are doesn't mean they are - just look at the Liberal Democrats in Russia (TeamGuns would probably hate them more than Trump). No politic party today, even if they are, will say they are fascist, or national socialist. There are just bad things associated with some things, and good things that get (dumb) voters in others.
You'll see that on average, Democratic voters favor increases in government spending on a variety of sectors.
Yeah, they want public spending and regulate some things, which is axiomatically left. However, they (or Sanders, at least) wants to lower government control in other things, such as military, which is why I think he is the best candidate for America (with good luck, he'll send its economy in shambles).