Do you know that any agency in the U.S. obeys laws? Do you verify this everyday, across the entirety of the USG?
That was always the striking thing to me about these leaks as compared to the NSA investigated by the Church Committee, is that in this case you see an NSA actually trying to comply with the law. This is why MUSCULAR is only overseas, or why only phone metadata was being collected, and only after legal approval by FISC and the FAA by Congress in 2011, and why all their slides talk about "USPERs" and non-USPERs.
If you want change in what NSA is permitted to do then the law is a great place to start. If nothing else it would make it clear to the rank-and-file NSA employee (the same ones Snowden went to bat for on his NBC interview) that there are new, clear boundaries instead of reliance on court orders and Supreme Court precedents.