Anyone who believes that Snowden told our enemies anything they did not know is hopelessly naive.
Every technologically advanced government in the world was/is acutely aware of our data collection activities, which are vast and obvious. Indeed, many governments are active participants in the program, providing covert collection sites in their respective territories. The quid-pro-quo was that the NSA would share data of interest to the local intelligence community.
The only group "kept-in-the-dark" were the citizens who paid the bills and who were the focus of much of the data collection. Snowden turned the spotlight on these activities.
It is now up to the informed populace to decide the extent that they will continue to allow their government(s) to spy on them.