The only potential benefit that can be salvaged out of the program is to establish who the leakers were, (I'm betting on Sens. Rockerfeller and/or Leahy), prosecute them to the full extent of the law and throw the fear of instant prison time into those who would comprimise other programs for political gain.
I still can't figure that one out. Before the program was disclosed, it was legal to conduct surveillance under a secret process with a secret warrant, and the target would never find out.
Now all we know is that secret surveillance can occur without a secret warrant, and the target still never finds out. Where's the beef?