I think this action would send a major positive signal to the world that the era of barbarism in the name of the United States has come to an end; that while as strong as ever in the pursuit of enemies, we will no longer resort to brutality against the unarmed in the dramatization of security.
If you are convinced that the abrasion of human rights and the Geneva Convention embraced by the Bsuh Administration (not just at Gitmo but throught its domain--ABu Ghraib comes to mind) was some sort of necessary evil, I suggest you recalibrate and refresh your thinking. That's MNSHO.