Where freely means...? Maybe many analysts can do almost everything, except access personal details of higher ranking NSA officials. Without a proper definition it's a meaningless statement.

Snowden wasn't an analyst

As a system administrator Snowden presumably had lower-level access to the systems than analysts.

Incorrect (former NSA system administrator here). We're "read on" to special compartments beyond the scope of our need to know due to the nature of our work. It would be quite difficult for me to correct an issue if I was unable to see and/or duplicate that issue.