It might be comparable to Sen. Richard Shelby (R-AL) divulging classified intercepted messages to Fox News when he was on the Senate Select Committee on Intelligence.
Investigators Concluded Shelby Leaked Message (washingtonpost.com)
But it has been widely known that the US and Pakistan have agreed to cooperative on anti-terrorism activities on the border...so, IMO, the revelation will have little impact.
Where the drones originate from is not what poses an increased threat to US troops....where they hit is what matters and what provokes a response that may pose a greater threat to the safety of those troops....particularly when civilians are killed.