While the EFF's position on revising the DMCA is referenced by the petition, the petition itself does actually does ask to "repeal the DMCA", presumably in its entirety (which I personally support).
On the other hand, the safe harbor provisions under the DMCA just protect you from penalties under the DMCA. I'd vote repeal the whole debacle (granted I haven't read the DMCA in a few years, but I don't recall seeing anything I liked save for the self-limiting provisions of the statute).
Edit: I'm wrong. Was thinking of just Title I. Title II and III are indeed worth saving!
You might want to re-read Sec. 512.
Now that I'm better informed... (thanks!) I change my position to repeal of Title I of the DMCA in its entirety, not the entire DMCA.