All right.
You talked about the threshold and the difference between “reasonable grounds to suspect” and “reasonable grounds to believe”.
Obviously, no one is against virtue. Everyone would prefer a higher threshold. The premise of the government, however, is that the information being sought, in other words, metadata, isn't evidence that can be presented to the court. It's information that will help further an investigation, to obtain evidence that can ultimately be used in court. That is why the government used the “reasonable grounds to suspect” threshold instead of “reasonable grounds to believe”. It is an accepted, recognized and well-known legal standard, after all.