Yes, the role of the NSA should be reviewed further, because it is a very important topic that needs a great deal of thought. The NSA should not be engaging in large-scale monitoring operations without the knowledge and consent of the people. The people should have a national discussion about whether this is a good idea.
As a United States citizen I believe the NSA should be fully reviewed and then possibly disbanded. Our country needs to learn it's limits with privacy and what they can and can not do to fight terrorism. What Snowden has released only scratches the surface of what he knows and citizens (and others around the world) have the right to know when they are being watched.