1. "give power back to the states" is fine, except where it is the Federal government's Constitutional duty that cannot be feathered away. EXAMPLE: Trump is talking about a national reciprocity law for gun owners; many states have unconstitutional gun laws (California, New York, Illinois, New Jersey, etc). Also, National Defense cannot be ceded back to the states. Read the history of the Civil War - the Confederates could not even get their logistics together because each state would not recognize any "central authority", and Gen Robert E. Lee almost resigned because of it.
2. Before President Trump goes down the rabbit trail of trying to dissemble the Federal behemoth, is it too much to ask for him to do something like repeal ObamaCare, indict the Clintons and Obama, and appoint a Supreme Court Justice first? If he cannot succeed at those smaller tasks, then he cannot accomplish all the wish list items in this author's piece.
I suspect they WON'T repeal ObamaCare, for example! They will dither, and pretend to repeal it, and then give us some garbage about a "phased in approach over 2 years" or something.