WTF? This person NEVER read the book.
The blog article cites the specific text from Levin’s amendments, and points out how they do little or nothing to scale back the actual size and scope of the current government.
The author takes the position of the truly-Limited government and original Constitution, and holds therefore that anything beyond the actual text of the constitution is Unconstitutional, and that Levin’s amendments might even make some things worse (non-legislative agencies would come under congressional oversight, thus allowing formerly-unconstitutional regulations to acquire the status of constitutionally-valid law as they would now be issued by a sub-division of the legislative branch).
If the author has cited Levin’s amendments in a contextually-correct way, then he/she is essentially correct.