Again, the title is misleading, including the title in the petition itself. The text is talking about a revision, which makes good sense. The DMCA itself is a larger piece of legislation that includes various other provisions not related to circumvention, like the safe harbor for sites that comply with the notice and takedown provisions. (Which has its own set of problems, but repealing that would not be helpful, because then there would be no statutory safe harbor since Sec. 230 of the Communications Decency Act that provides a safe harbor for most other things explicitly excludes "intellectual property.")